A 22-year-old Boyes Hot Springs man was in custody Tuesday on suspicion of the April 25 beating and stabbing of popular Sonoma resident Austin Ridge, Sonoma County sheriff's officials said.
Logan Dunning was being held without bail at county jail in Santa Rosa on suspicion of attempted murder, mayhem and crimes against a person with disabilities, Lt. Dennis O'Leary said.
Dunning already was in jail after being charged with felony arson in connection with a series of fires in parked cars in a west Santa Rosa neighborhood.
"We are relieved," said Ridge's mother, Kimberly Ridge. She said no one in her family knew Dunning before the attack.
Tests on a knife found at Dunning's home indicated it was used during the attack on Austin Ridge as he rode his customized tricycle home, O'Leary said.
"The DNA linked him to the crime," O'Leary said. "There was blood evidence at Dunning's home that belonged to the victim."
Ridge, 28, is a popular figure in Sonoma, a gregarious physically disabled man who rode miles each day around the city, socializing along the way. He was disabled about ten years ago in a car crash.
He is at home recuperating after a lengthy hospital stay.
A newspaper delivery person found Ridge beaten and bloody at about 4:30 a.m. on a Wednesday, lying on the ground on residential Lucas Avenue in Boyes Hot Springs.
Dunning is suspected of beating Ridge with his fists, a rock and stabbing him, O'Leary said. Ridge suffered a broken jaw, fractured nose and significant head injuries as well as stab wounds to his arms and torso.