OAKLAND -- A man on probation for illegal possession of a knife has been charged with stabbing an award-winning East Bay artist to death in June at a West Oakland duplex, police said Wednesday.

Police said Gregory Hall, 59, was charged Tuesday with murder and violating probation. He is being prosecuted under the state's three strikes law because of 1997 and 1999 burglary convictions and could face a 56-year-to-life sentence if convicted.

Hall is accused of fatally stabbing Michael Thorn Bradley, 67, whose decomposed body was found June 14 in his duplex in the 3300 block of Market Street.

Hall, a transient with addresses in Oakland, Berkeley and San Leandro, was living next door to the duplex when the stabbing occurred, police said. He has said he did not kill Bradley and did not know him, Officer Leo Sanchez said.

Sanchez said police were able to link Hall to the killing through physical evidence but would not say what it was.

A probable cause warrant was later obtained for Hall's arrest. On Friday, he showed up at Highland Hospital and told deputy sheriffs who patrol the hospital that he had come there to rest, authorities said. Deputies did a routine background check and confirmed the arrest warrant.

Hall is on probation for a Nov. 1, 2010, incident where BART police arrested him on suspicion of threatening someone with a knife at the Lake Merritt station. He was convicted Nov. 11, 2010, of carrying a concealed "dirk or dagger" and put on three years probation.

Bradley, who had three degrees from UC Berkeley, was an award winning painter and sculptor whose work had been exhibited around the country and commissioned in places including North Carolina and Texas as well as throughout the Bay Area. He also published several books of poetry and photography. He had moved to the West Oakland residence 18 months before he was killed after living in Berkeley for decades.