S14, E11: The body of a homeless man who was run over by a car is found in Roosevelt Park. He's been dead about a week but his body had most likely been somewhere cold, then it was dumped in the park. Briscoe and Green talk to other homeless people in the park, including a man named Max, but they have a hard time identifying the victim. A key from a locker leads them to his personal belongings, stored at a YMCA, and they discover he's Alan Fisher, a schizophrenic who had been on the streets for about two years. It takes awhile, but CSU Tech Julian Beck figures out Fisher was run over by a vehicle whose automakers use lasers to microscopically etch the VIN number on the windshield, only found on Aston-Martins. And the one that killed him was green. The car in question belongs to a hot publicist named Carrie Salter. She is nervous when questioned and a trip to the Aston-Martin body shop gives the Detectives the evidence they need.