FBI searching Nevada house of Las Vegas gunman

PHOTO: Las Vegas gunman Stephen Paddock is seen here in a government ID photo.PlayObtained by ABC News
WATCH Investigators suspect the Las Vegas gunman had undiagnosed mental illness

The FBI was at the Mesquite, Nevada, home of Las Vegas gunman Stephen Paddock today, executing a new search after interviewing Paddock's girlfriend, the local police chief told ABC News.

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Mesquite Police Chief Troy Tanner said the FBI contacted the Mesquite PD for assistance in executing the new federal search warrant on the house where Paddock lived with his girlfriend, Marilou Danley.

Tanner said he was told the FBI wanted to take another pass at searching the house after they interviewed Danley, and they were there this afternoon, conducting searches and photographing and processing evidence.

Paddock killed 58 people and injured hundreds of others in a shooting rampage from his room on the 32nd floor of the Mandalay Bay Hotel and Casino, when he opened fire on 22,000 concertgoers attending the third day of the Route 91 Harvest Festival along the Las Vegas Strip last Sunday.