The Rocky Mountain News has obtained a copy of a letter believed to be signed by a 26-year-old gang member that says he fired the shots that killed Denver Broncos player Darrent Williams.
The letter is the first piece of evidence known publicly to link a triggerman to the New Year's Day 2007 shooting, the city's highest profile unsolved murder.
It carries the signature "Willie D. Clark."
Clark was arrested on a parole violation days after the slaying and is in jail on pending drug charges.
In the letter, Clark says he is worried someone who saw him shoot "D-Will" - a nickname for Williams - will start talking to police about the killing.
"(The person) seen me with the gun and shoot out the whip," the letter states.
"Whip" is slang for a car. Police have said the shots that killed Williams were fired from a Chevy Tahoe shortly after Williams and a group of friends left a Denver nightclub.