Oct. 3: The science behind SIU cases at S. Walter Stewart

Police shooting. Pursuit that ends in a motor vehicle collision. Use of force during a struggle and arrest.

If any of these incidents ends with serious injury or death, the Special Investigations Unit is notified and starts an investigation to determine if the officer or officers involved acted criminally. As part of these investigations, the SIU assigns and dispatches forensic investigators, who measure, photograph, collect, and analyze evidence from the scenes of these incidents.

A member of the SIU explains the science behind investigations at the S. Walter Stewart Library, 170 Memorial Park Ave., on Oct. 3 at 6:30 p.m.

For more information, call the library at 416-396-3975.