EyeWitness Identification
Policy text
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Source file: 1.09 EyeWitness Identification.pdf. Policy dates appear on the original cover. Page links use the PDF's page order.
Numbered references matching MPAC standards open the Massachusetts Police Accreditation Commission’s official manual at the standard’s PDF page. Older MPAC numbers open its numbering crosswalk. Other printed references open CALEA’s official titles list; unlisted numbers open the directory. The original policy labels and reference numbers are preserved.
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Policy & Procedures No. 1.09
Subject:
Eyewitness Identification
Issuing Authority: Effective Date: Review Date:
Chief of Police 12/13/2013 09/25/2023
References:
Review
Revision 11/24/2016
Reissued 04/12/2018
Dates: 07/25/2020
CALEA Standards: 42.2.11 42.2.12
BACKGROUND:
The identification of a suspect by an eyewitness can be an important component of a criminal
investigation but can be equally significant in clearing an innocent suspect. Many people who
have been convicted of serious crimes, only to later be exonerated by scientific evidence, were
originally convicted based in large part on mistaken identification by a witness. Eyewitness
misidentification is the single greatest cause of wrongful convictions nationwide, playing a role
in over 75% of convictions overturned through DNA testing. The Canton Police Department
recognizes that it is as much the responsibility of the police to protect the innocent from
conviction as it is to assist in the conviction of the guilty.
The identification of criminal offenders must be approached with extreme caution as the court
may exclude eyewitness evidence, if it determines that police methods were unnecessarily
suggestive.
I. POLICY: 42.2.11
It is the policy of the Canton Police Department that:
1. Identification procedures be conducted in a non-prejudicial and non-suggestive manner,
2. Eyewitnesses will be given specific instructions prior to being shown a suspect 42.2.11 D
3. Photo arrays and line-ups will be conducted using sequential rather than simultaneous
presentation; and
4. Photos arrays, line-ups and voice identifications will be conducted using blind
administration when feasible.
II. DEFINITIONS:
Show Up: The presentation of one suspect to an eyewitness shortly after the commission of a
crime. 42.2.12 A
Field View: The exposure of an eyewitness to a group of people in a public place on the theory
that the subject may be among the group. A field view differs from a show-up in that it may be
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conducted well after the commission of the crime and may be conducted with or without a suspect in the group. Photo Array: showing of photographs of several individuals to an eyewitness for the purpose of obtaining identification. Line-up: The live presentation of a number of people to an eyewitness for the purpose of obtaining identification. A line-up differs from a field view in that it is conducted in a controlled setting, such as a police station, a known suspect is in the mix, and the participants are aware that an identification procedure is being conducted. Voice Line-up: A procedure in which a witness is permitted to hear the voices of several people for the purpose of obtaining an identification of a suspect’s voice. Blind Administration: The procedure by which an officer who does not know the identity of a suspect is used to present a photo array, line-up, or voice identification, to avoid even the suggestion of undue influence over the witness’ choice. This technique has been recommended by the National Institute for Justice, and is intended to ensure that the witness does not interpret a gesture or facial expressions by the officer as an indication as to the identity of the suspect. The technique also allows the prosecution to demonstrate to the judge or jury at trial that it was impossible for the officer showing the photographs to indicate to the witness, intentionally or unintentionally, which photograph he/she should select. III. PROCEDURES: Right to Counsel During Identification Procedure Once a suspect has been arraigned or indicted, his/her right to have counsel present at an in- person identification procedure attaches. No right to the presence of counsel exists simply because a complaint has been filed, even if an arrest warrant has issued. No right to counsel attaches for non-corporeal identification procedures, such as those involving photographs or composite drawings, whether conducted before or after the initiation of adversarial criminal proceedings. General Considerations Due process requires that identifications be conducted in a fair, objective, and non-suggestive manner. 42.2.12 G Due process is violated when identification procedures arranged and/or conducted by the police are unnecessarily suggestive and conducive to irreparable mistaken identification. Prior to conducting an identification procedure, officers should take a statement from the witness and document a full description of the offender in a police report. 42.2.12 G If practicable, the officer should video and audio record the procedure and the witness’ statement of certainty. 42.2.11 B If not, the officer should jot down the witness’ exact words and Canton Police Department’s Eyewitness Identification Policy Page 2
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incorporate them into his/her report. If a photo array is shown to the witness, the witness should be asked to initial and date the front of the photograph selected. A police report of every show-up, photo array, line-up or voice identification procedure, whether an identification is made or not, shall be submitted. 42.2.11 G, 42.2.12 G The report shall include a summary of the procedure, the persons who were present for it, instructions given to the witness by the officer (this should be accomplished by submitting the appropriate witness instruction form), any statement or reaction by the witness, and any comments made by the witness regarding the identification procedure. Witness Instructions Whenever practicable, an officer conducting an identification procedure will read the witness a set of instructions from a departmental form (show-up card, or photo array or line-up instruction form). 42.2.11 D, 42.2.12 D Those instructions should include the following: 1. The person who committed the crime may or may not be the person, or in the set of photographs, you are about to view. 2. You should remember that it is just as important to clear innocent persons from suspicion as to identify guilty parties. 3. The individuals you view may not appear exactly as they did on the date of the incident because features such as head and facial hair are subject to change. (This instruction not for use during show-ups or voice identifications.) 4. Regardless of whether or not you select someone, the police department will continue to investigate the incident. 5. The procedure requires the officer to ask you to state, in your own words and without using a numerical scale, how certain you are of any identification. 6. If you do select someone, please do not ask the officer questions about the person you have selected, as no information can be shared with you at this stage of the investigation. 7. Regardless of whether you select a person, please do not discuss the procedure with any other witnesses in the case. Show-ups 1. Show-up identification procedures should only be used soon after a crime has been committed, typically within two hours, or under exigent circumstances, such as the near death of the only available witness. Show-ups should be conducted live whenever possible and not photographically. Officers should not attempt to obtain identifications using RMV photos on their cruiser MDT’s, unless a compelling reason or emergency exists. 42.2.12 A 2. When a show-up is arranged in an emergency situation, where either a witness or a victim is in imminent danger of death or in critical condition in a hospital, and the circumstances Canton Police Department’s Eyewitness Identification Policy Page 3
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are such that an immediate confrontation is imperative, the emergency identification
procedure shall be conducted in a non-suggestive manner.
3. Every show-up must be as fair and non-suggestive as possible. Specifically, if the
suspect is handcuffed, he/she should be positioned so that the handcuffs are not visible to
the witness. Unless it is necessary for the safety of the officers or others, the suspect
should not be viewed when he/she is inside a police vehicle, in a cell, or in jail clothing.
4. Detaining a person who fits the description of a suspect in order to arrange a show-up is
lawful where the officer has reasonable suspicion that the suspect has committed a crime,
even if probable cause to arrest has not yet developed.
5. If the witness fails to make a positive identification and sufficient other evidence has not
developed to provide probable cause to make an arrest, the suspect must be permitted to
leave. His/her identity should be recorded and included in the officer’s report.
6. If a suspect is stopped within a short time after the commission of the crime, he/she may
be taken to a location where he/she can be viewed by a witness for possible
identification; or, he/she may be detained at the site of the stop and the witness taken
there to view him/her. Transporting the witness to the site of the stop is preferred if
circumstances permit.
7. Suspects should not be brought into a crime scene as contamination may result. For the
same reason, clothing articles found at the crime scene should not be placed on or in
contact with a suspect. A suspect should not be brought back to the home of a victim or
witness unless that was the scene of the crime.
8. Police officers must not do or say anything that might convey to the witnesses that they
have evidence of the suspect’s guilt. Officers should turn down their radios so that the
witness they are transporting does not pick up information about the stop of the suspect.
42.2.11 F, 42.2.12 F
9. The suspect should be viewed by one witness at a time and out of the presence or hearing
of other witnesses. Witnesses who have viewed the suspect should not be permitted to
communicate with those who have not. 42.2.11 C, 42.2.12 C
10. Where multiple witnesses are available to identify the subject, officers should permit the
subject to be identified by only one or two. Once one or two witnesses have identified
the subject during a show-up, further identifications should be attempted by means of a
photo array or line-up. 42.2.11 C, 42.2.12 C
11. Officers may transport victims or witnesses in police vehicles to travel through the area
where a crime has just occurred in order for them to attempt to point out the perpetrator.
42.2.12 B While checking the area, officers must be careful not to make any statements
or comments to the witnesses which could be considered suggestive. 42.2.12 F
12. Officers should make written notes of any identification and any statements made by
witnesses at the time of confrontation with the suspect. Once a witness has indicated
his/her opinion regarding the identity of the subject, the officer should ask the witness
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how certain he/she is of the identification. 42.2.11 E, 42.2.12 E,G Officers should ask the witness not to use a numerical scale, but rather to indicate certainty in his/her own words. All statements by the witnesses should be incorporated into the officers’ report. IV. PREPARING A PHOTO ARRAY 42.2.11 A 1. Photo arrays should be shown to witnesses as soon as possible after the commission of a crime. 2. Include one suspect and seven fillers (non-suspects) in each array. Mark the back of each photo with numbers one through eight. 3. Try to use photographs of the same size and basic composition. Do not include more than one photograph of the same person. 4. Use a photo of the suspect that closely depicts his/her current appearance. 5. Select fillers who generally fit the witness’ description of the offender. Avoid fillers who so closely match the suspect that a person familiar with the suspect would have difficulty distinguishing the filler. 6. Ensure that photos bear no markings indicating previous arrests. 7. Create a consistent appearance between the suspect and fillers with respect to any unique or unusual feature such as facial scars or severe injuries by adding or covering the feature. 8. Once the array has been assembled, examine it to ensure that nothing about the suspect’s photo makes him/her stand out. 9. Consider changing the order of photos from one witness to the next, or when a witness asks to see the array a second time. 10. When showing a witness an array containing a new suspect, avoid using fillers from a previous array already shown to the witness. V. SHOWING A PHOTO ARRAY General Guidelines 1. The procedure must be conducted in a manner that promotes reliability, fairness and objectivity. 2. Allow each witness to view the photographs independently, out of the presence and hearing of the other witnesses. 42.2.11 C Canton Police Department’s Eyewitness Identification Policy Page 5
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3. Never make suggestive statements that may influence the judgment or perception of the
witness. 42.2.11 F
4. The investigating officer of the blind administrator should carefully instruct the witness
by reading from a departmental Photo Array Instruction Form, 42.2.11 D and the
witness should be asked to sign the form indicating that he/she understands the
instructions. The investigating officer and the administrator should also sign and date the
form.
5. The administrator should show the photographs to a witness one at a time and ask the
witness whether or not he/she recognizes the person.
6. When the witness signals for the next photograph, the administrator should move the first
photograph so that it is out of sight and ask the witness whether he/she recognizes the
next photograph.
7. The procedure should be repeated until the witness has viewed each photograph. If the
witness identifies a subject before all the photographs have been viewed, the
administrator should remind the witness that he/she is required to show the rest of the
photographs.
8. If the witness fails to make identification, but asks to view the array a second time, the
administrator managing the identification should ask the witness if he/she was able to
make identification from the original viewing. If the witness is unable to make
identification, but feels that it would be helpful to repeat the procedure, then it is
permissible to show the entire array a second time. The order of the photographs should
be shuffled before the array is shown for the second time. An array should not be shown
more than twice.
9. If the witness identified the suspect, the administrator should ask the witness how certain
he/she is of the identification. Officers should ask the witness not to use a numerical
scale, but rather his/her own words. 42.2.11 E
10. The photo array should be preserved as evidence in the same configuration as when the
identification was made.
Blind Administrator
1. A second officer, known as the blind administrator, who does not know which
photograph depicts the suspect should actually show the photographs.
2. For the reasons above, the officers should explain to the witness that the officer showing
the array does not know the identity of the people in the photographs.
3. The investigating officer should leave the room while the array is being shown by the
blind administrator.
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Investigating Officer as Administrator
1. If the use of a second officer is not practicable, the officer showing the array should
employ a blind technique. In other words he/she should show the array in such a manner
so the he/she cannot tell when the witness is viewing a photograph of the suspect.
2. This can be achieved by placing each photo in a folder and shuffling the order before
handing each folder to the witness. The witness can then look at the photo and the officer
will not see which photo they are looking at. Another method is to use a computer
program that randomly shows the witness a photo.
VI. LINE-UPS
1. Line-ups shall be conducted under the direction of a supervisory officer, or in his/her
absence, the Chief of Police and, when feasible, after consultation with the District
Attorney's Office.
2. A suspect cannot be detained and compelled to participate in a line-up without probable
cause to arrest. If a suspect refuses to participate in a line-up, the District Attorney’s
Office may be asked to apply for a court order to compel the suspect to cooperate.
3. Before any suspect who has been arraigned or indicted is shown to eyewitnesses in a line-
up or other live identification procedure, he/she must be informed of his/her right to have
an attorney present at the line-up and of his/her right to be provided with an attorney
without cost if he/she is unable to afford such legal counsel. Unless a valid waiver is
voluntarily and knowingly made, in writing if possible, no such identification may
proceed without the presence of the suspect's attorney.
4. Select a group of at least five fillers who fit the description of the subject as provided by
the witness(es). Because line-ups will be conducted by a blind administrator (an officer
who does not know the identity of the suspect), the fillers selected should not be known
to the blind administrator. In selecting line-up fillers, abide by the guidelines for photo
array fillers as described above. 42.2.11 A
5. All persons in the line-up should carry cards that identify them only by number and
should be referred to only by their number. As with photo arrays, each witness must
view the line-up independently, out of the presence and hearing of the other witnesses.
6. The investigating officer should explain to the witness that a second officer (the blind
administrator) will be conducting the line-up, and that he/she does not know the identities
of the people participating in the line-up. 42.2.11 D
7. The investigating officer should carefully instruct the witness by reading from a
departmental Line-up Instruction Form, and the witness should be asked to sign the form
indicating that he/she understands the instructions. The officer should also sign and date
the form. 42.2.11 D
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8. The investigating officer should leave the room while the blind administrator conducts
the line-up.
9. The line-up should be conducted so that the suspect and fillers do not actually line up, but
rather so that they are displayed to the witness one at a time. This can be accomplished
either by having them stand with their back to the witness and then face the witness one
at a time, or by having them enter the room individually and leave before the next one
enters.
10. The procedure for showing the participants to the witness and for obtaining a statement of
certainty is the same as for photo arrays. If practicable, the officer should record the
procedure. 42.2.11 E
11. When an attorney for the suspect is present, the attorney should be permitted to make
reasonable suggestions regarding the composition of the line-up and the manner in which
it is to be conducted. Any suggestions made by the suspect's attorney should be included
as part of the line-up report.
12. Allow counsel representing the accused sufficient time to confer with his/her client prior
to the line-up. Once the line-up is commenced, attorneys should function primarily as
observers and he/she should not be permitted to converse with the line-up participants, or
with the witnesses, while the line-up is underway. The concept of blind administration
requires that no one be present who knows the identity of the suspect. For this reason,
the attorney should leave the room before the line-up begins.
13. The suspect's attorney is not legally entitled to the names or addresses of the witnesses
viewing a line-up if the suspect has not yet been arraigned or indicted. If an attorney in
such a situation insists on having information about line-up witnesses, advise him/her to
direct his/her request to the District Attorney's Office.
14. During a line-up, each participant may be directed to wear certain clothing, to put on or
take off certain clothing, to take certain positions or to walk or move in a certain way. If
officers are to ask the participants to wear an article of clothing, they must guard against
circumstances where the article only fits the suspect. All line-up participants shall be
asked to perform the same actions.
15. Line-up participants must not speak during the line-up. If identification of the suspect’s
voice is desired, a separate procedure must be conducted. (See section on voice
identification below.)
16. After a person has been arrested, he/she may be required to participate in a line-up
regarding the crime for which he/she was arrested. After arrest, a suspect may lawfully
refuse to participate in a line-up only if he/she has a right to have counsel present (post
arraignment/indictment) and the counsel is absent through no fault of the suspect or
his/her attorney.
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VII. VOICE IDENTIFICATION
1. Although considerably less common than visual identifications, voice identifications may
be helpful to criminal investigations where the victim or other witness was blind, the
crime took place in the dark, the subject was masked, the witness’ eyes were covered by
the perpetrator, or they were never in the same room with the perpetrator but heard
his/her voice. If officers wish to conduct a voice identification procedure with a witness
who also saw the subject, they must first consult with a supervisor, or in his/her absence
the Chief of Police, and when feasible, the District Attorney's Office.
2. As with any in-person identification or confrontation, if the suspect has been arraigned or
indicted, he/she has a right to the presence of counsel at the voice identification
procedure.
3. Where voice identification is attempted, the following procedures should be employed to
the extent possible:
a. As in a line-up, there should be at least six persons whose voices will be listened to by
the witness; one-on-one confrontations should be avoided. Because line-ups will be
conducted by a blind administrator, who does not know the identity of the suspect, the
fillers should not be known to the blind administrator, and officers should abide by the
guidelines for photo array and line-up fillers as described above;
b. The suspect and other participants shall not be visible to the witness; this can be done by
on, or by similar means;
c. All participants, including the suspect, shall be instructed to speak the same words in the
same order;
d. The words recited by the participants shall not be the ones spoken by the offender during
the crime; the line-up participants should speak neutral words in a normal tone of voice;
e. When both a visual and voice line-up are conducted, the witness should be informed that
the line-up participants will be called in a different order and by different numbers;
f. If there are two or more suspects of a particular crime, present each suspect to witnesses
in separate line-ups. Different fillers should be used to compose each line-up.
4. As with any identification procedure, police officers should avoid any words or actions
that suggest to the voice witness that a positive identification is expected or who they
expect the witness to identify.
5. The investigating officer should carefully instruct the witness by reading from a
departmental Voice Identification Line-up Instruction Form, and the witness should be
asked to sign the form indicating that he/she understands the instructions. The officer
should also sign and date the form. If practicable, the officer should record the
procedure. 42.2.11 D
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6. Adhere to the principles of blind administration as described above. As is the case with
photo arrays and line-ups, the investigating officer should leave the room while the blind
administrator conducts the procedure.
VIII. COURTROOM IDENTIFICATION
Prior to conducting any courtroom identification procedure, officers should consult the
District Attorney’s Office. The same right to an attorney and the same due process
considerations that apply to all other identification procedures also applies to station
house and courtroom identifications.
1. If the suspect has been arraigned or indicted, he/she has a right to have counsel present at
any in-person identification/confrontation.
2. Live confrontations and informal viewings of the suspect by witnesses must be conducted
in such a manner as to minimize any undue suggestiveness.
3. Officers shall not state or suggest that the suspect has been arrested or booked or that
he/she has made any confession or incriminating statement or that any incriminating
evidence has been uncovered. The witness' identification, particularly if it takes place in
a police station or courtroom, must be a result of his/her recollection of the appearance of
the perpetrator and must not be unduly influenced by information or suggestions
originating from the police.
IX. DRAWINGS AND IDENTI-KIT COMPOSITES
An artist's sketch, computerized drawing, composite, or other depiction can sometimes
aid an investigation, but are most effective when a witness has a good recollection of the
offender’s facial features. However, research has shown that a person selected based on
resemblance to composite is more likely to be mistakenly identified. Additionally, building a
composite has been shown to lower a witness’ accuracy for identifying the original face.
Prior to attempting a sketch or composite, officers should take from the witness and document a
full description of the offender.
1. A sketch prepared by a trained artist is preferred over a composite.
2. Sketches and composites should not be attempted prior to the showing of a photo array or
line-up.
3. Once the sketch or composite has been completed, the witness should be asked to state in
his/her own words how accurately the composite reflects how the suspect appeared
during the crime and a report should be prepared regarding the sketch or composite
procedure.
4. The fact that a suspect resembles a sketch or composite is not, without more, probable
cause to believe that the suspect is the offender.
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XI. MUG SHOTS
When an investigation has failed to identify a suspect, it may be advisable to have eyewitnesses
come to the police station to look through photographic files. However, officers should not
resort to this procedure until other investigative avenues have been exhausted.
1. Remove or hide any information on the photographs that might in any way influence the
witness;
2. Ensure that the files contain only one photograph of each individual and that the
photographs are reasonably current;
3. Do not refer to the photographs as “mug shots”; 42.2.11 F
4. If photographs of various formats are used, ensure that several of each format are used;
5. Permit the witness to look at a number of photographs before making his/her selection;
6. Do not call to the attention of the witness any particular photograph; 42.2.11 F
7. A report shall be filed following the procedure, regardless of whether an identification is
made. The report should describe the photographs viewed by the witness(es). 42.2.11 G
8. Officers should be extremely cautious before charging a subject based on this type of
identification alone.
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