Bruce Paddock, 59, was taken into custody at a North Hollywood, California assisted living home on Wednesday

He is the brother of Las Vegas shooter Stephen Paddock  

Police had been investigating Bruce for child porn since before the shooting

After the massacre, they received a tip about Bruce's whereabouts 

A brother of Las Vegas shooter Stephen Paddock has been arrested for child pornography. 

Bruce Paddock, 59, was arrested Wednesday morning at 8:40am at an assisted living home in North Hollywood, California.

Bruce had been under investigation for child porn since before the October 1 shooting, but officials didn't know where he was living.