The Collision Analysis & Reconstruction Squad is an on-call unit within the Stamford Police Department. The responsibilities of the squad include the investigation of all serious injury collisions, as well as crashes that are likely to, or do result in a fatality.

The C.A.R.S. unit responds to collision scenes regardless of the time of day or night, and weather. Their function includes determining the sequence of events, the underlying causes and responsibilities, and ultimately to prosecute those responsible in both criminal and civil courts.

There are currently eight members of the squad, which is supervised by a sergeant, who reports to the Assistant Chief of Patrol Operations. Of the 8 members, 1 is a trained reconstructionist, the highest level of training. 4 are trained to the Advanced level, and the remaining officers are trained to the At Scene level. In addition, some members of the squad have received advanced training in Pedestrian collisions, Commercial motor vehicle crashes, Motorcycle crashes, and Crash Photography.

In addition to at scene investigative skills the officers of the unit utilize interview and interrogation techniques, search and seizure experience, inclusive of search and arrest warrant applications, and testimony in criminal prosecution as well as civil deposition and testimony.

The officers of the unit are frequently called upon to provide their skills in Operating Under the Influence (OIU) testing and enforcement; collision reduction by speed enforcement (using radar and laser) and truck regulation enforcement. Three of the senior officers of the unit are Instructors at the Stamford Police Academy in the areas of Collision Investigation; Motor Vehicle Law; OUI Enforcement and the Draeger 7510 breath instrument.