The Wellesley Police Department has several officers certified in collision analysis and reconstruction.
Sergeant Scott Showstead, Sergeant Mike Lemenager, Sergeant Mark Carrasquillo, Officer Tim Dennehy, Officer Mike Gerard, and Officer Mark Knapp are all members of the Wellesley Police Department's Accident Reconstruction Unit.
Collision Analysis and Reconstruction involves the collection and analysis of evidence found at the scene of a motor vehicle and/or pedestrian collision involving serious injury or death. Evidence collection includes forensically mapping the scene of the collision to include any visible evidence, such as vehicles (or their parts), persons, tire marks, clothing, or other pertinent areas, along with collecting data from any vehicles involved in the collision. Analysis of the evidence involves the application of physics combined with influences of the environment and human factors.