
Police
Polygraph Unit
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Polygraph Unit has been in existence in the Philadelphia Police
Department since 1953 , with one (1) examiner and one (1) instrument.
During its first year approximately two hundred (200) examinations
were conducted. At the present time the Polygraph Unit is part
of the Forensic Sciences Division.
The Polygraph Unit serves as an investigative aid for criminal
investigations, conducting examinations of suspects, victims,
witnesses and informants; and the unit is a component in the
hiring process of Police applicants and personnel seeking reinstatement.
Unit services are also provided to outside jurisdictions, upon
approval of the Police Commissioner.
The Polygraph Unit also maintains voice recordings of all sworn
officers in the department for voice-print analysis if required.
During the year, approximately 120 investigative examinations
and 2300 police applicant examinations are conducted.
Polygraph Unit personnel require specialized training which
is provided by an outside accredited Polygraph School. The training
includes 256 hour of classroom study followed by an internship
program which takes approximately one (1) year.
Current Staff: One (1) Lieutenant Commanding Officer; two (2)
Sergeants-Squad Supervisors; two (2) Detectives and five (5)
Police Officers. Personnel assigned to the Polygraph Unit are
divided into 2 squads, working the 8:am to 4:pm tour and 4:pm
to 12:pm tour.
The Polygraph Unit is located in Room B-7 of the Police Administration
Building. There are two (2) examinations rooms with instruments
and two (2) back up instruments which could be used for off
site examinations. The Polygraph unit also has a Voice Spectrograph
Machine for Voice-Print analysis. The Polygraph Unit is kept
locked at all times due to the extremely sensitive reports kept
in the unit.

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