Las Vegas shooting: Stephen Paddock's laptop is missing its hard drive

Investigators are still trying to determine a motive for the October 1 shooting

Investigators are still trying to determine a motive for the October 1 shooting

An FBI spokeswoman confirmed to CBS News that federal officials assisted the Los Angeles Police Department Wednesday in arresting Bruce Paddock.

The complaint alleges that Paddock had more than 600 photos in 2014.

The brother of the man behind the worst mass shooting in modern U.S. history has been arrested on suspicion of having child pornography, police said today.

According to the LAPD, officials began investigating Paddock after finding evidence at a business where the 59-year-old had been squatting.

Add Las Vegas Shooting as an interest to stay up to date on the latest Las Vegas Shooting news, video, and analysis from ABC News. Stephen Paddock killed himself after the attack.

According to the publication's sources in law enforcement, the police were alerted to a tip that suggested Paddock was in possession of child porn on his computer.

Stephen Paddock carried out the deadliest mass shooting in modern US history, killing 58 concertgoers and injuring hundreds of others, when he opened fire from a Las Vegas hotel room on October 1.

Sources also informed them that prior to Stephen Paddock's mass shooting, police were attempting to locate his brother, Bruce, without success. Police have found no such connection, however. In case there are more victims, call Juvenile Div 562-624-4027.

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