I'm a past investigator for public insurance in Manitoba. I spent 24 years there and I was 12 years a municipal police officer. In my latter years as an investigator, it was quite common to find needles stuck in seats, when the car thieves, particularly the chronic repeat offenders, would purposely leave needles so that the tow-truck driver, the police investigator, or whoever would sustain injury from sitting on that seat.
On December 6th, 2007. See this statement in context.