Ryan Backmann doesn’t know who killed his father.
His dad, Clifford Backmann, 56, was a construction worker. He was working a side job in the middle of the day six years ago when it happened.
“Detectives think that a random person was crossing through the parking lot, saw my dad in there by himself and he walked in. My dad was vacuuming up drywall dust, (the person) put the gun in his back, pulled the trigger and reached in and pulled the wallet out of my dad’s back pocket,” he said.