Ken Gorman grew and sold marijuana for medical use from his home on South Decatur Street. That's where he was murdered on the evening of Feb. 17, 2007.

Friends say the 60-year-old pot advocate had once been an air traffic control manager who lost his job after a nationwide strike in 1981.

Gorman then became Colorado's most visible advocate for legalization of marijuana.

"God bless pot!" he cried during a 1995 rally on the steps of the State Capitol.

A few years later, he campaigned to become "Governor Pothead" of Colorado.

His friend, Dominic Mestas, says the campaign was largely in jest, but Gorman became very serious about the issue of providing marijuana to cancer patients.

"Ken's main goal before he died was helping medical marijuana patients," Mestas said. "He really changed when he met a lot of those patients. It really touched him."

Neighbors heard gunshots coming from Gorman's home about 8 p.m. the night of his death. Police found evidence of a struggle in the front room where Gorman's body was found. He had been shot once.

Witnesses saw two men running from the home. The first is described as Hispanic or Indian, about 6 feet tall, with medium build, and long hair pulled back in a ponytail. The second man was shorter, appearing to be Hispanic or Asian in his 20s.

Denver Police Det. Dave Belue says his department will continue investigating the case until it is solved.

"Any information that will help get us to that point is greatly appreciated," Belue said.

Police say they believe the motive for the murder was robbery, but they don't know how much, if any, cash or drugs were taken.

If you can help with the investigation, call Crime Stoppers at 720-913-STOP (7867). Your information could make you eligible for a cash reward of up to $2,000.