Mark Grgurich, an avid cyclist and artist was killed in a hit-and-run accident on August 30, 2009 as he was doing a 100 mile bike run in rural Iowa. After examining the location, all police investigators had was a vague description of the vehicle (a truck) and the following clue:

The clue left behind at the scene of the crime

Not having much else to go on, they asked the public for help in identifying the small plastic fragment they believed belonged to the vehicle that killed Mr. Grgurich, hoping it would generate some leads. Little did they expect what ensued.