PHOENIX – An Arizona death row inmate convicted of killing six people in Phoenix's "serial shooter" attacks has died in prison.
Prison officials say 40-year-old Dale Hausner was found unresponsive in his cell in Florence around noon Wednesday. He was pronounced dead at a hospital about an hour later.
Authorities say the cause of death is under investigation.
Hausner was sentenced to die for his convictions in a series of random shootings in the Phoenix area in 2005 and 2006.
Investigators say Hausner preyed on pedestrians, bicyclists, dogs and horses during a 14-month conspiracy that occasionally included his brother and his former roommate, Sam Dieteman.
Dieteman pleaded guilty to two of the killings.