Investigative Services Unit

The Investigative Services Unit (ISU) is responsible for the investigation of felony crimes such as assault, sexual assault, robbery, burglaries, as well as misdemeanor crimes such as larcenies, disorderly conduct, property damage and more. The unit is also responsible for administering victim services, crime scene processing, evidence, threat assessment, and dignitary protection.Captain Keith Pullen, Investigative Services Officer in Charge (OIC).

Captain Keith Pullen, who serves as the Investigative Services Officer in Charge (OIC), oversees the unit’s activities. He liaises with local, state, and federal law enforcement agencies, courts, and social service agencies.

Pullen is assisted by Sergeant Angelo DeLieto, executive officer for ISU. DeLieto is responsible for supporting the OIC in the efficient operation of the unit. He is an investigator responsible for supervising and conducting criminal and administrative investigations assigned by the OIC or the captain. The executive officer is also responsible for the administration of the Victim Services program.

The unit has seven detectives. They are responsible for conducting initial and follow-up criminal and administrative investigations and developing sources of intelligence and information. They review and analyze reports, records, and the results of laboratory examinations; conduct follow-up interviews and interrogations; seek additional information from officers, witnesses, victims, complainants, and other law enforcement agencies; plan, organize, and conduct searches and collect physical evidence; identify and apprehend suspects; prepare arrest and search and seizure warrants; prepare cases for court presentation in conjunction with the State Attorney’s Office; and develop confidential and intelligence information.