A San Luis Obispo man is behind bars on suspicion of domestic violence. Police found out about the incident while the victim was being treated for a non-life-threatening stab wound. She told investigators that she shared a residence on Toro Street and that 39-year-old Ryan O’Hara threatened to use a firearm to avoid going back to prison. Police caught up with O’Hara outside his home. They also found a loaded shotgun. O’Hara is facing several domestic violence and weapons charges.