Authorities found “several hundred images” of child porn on a computer belonging to Las Vegas gunman Stephen Paddock, according to a preliminary report on the case released Friday.

Paddock’s estranged brother, Bruce Paddock, was arrested in October on child pornography charges.

Bruce Paddock had over 600 explicit images of minors on a computer he’d left in an auto repair shop he’d been squatting in, according to a complaint.

On Oct. 1, Stephen Paddock unleashed the deadliest mass shooting in modern American history, killing 58 people at a country music festival on the Las Vegas Strip.