They’ve yet to officially explain the backstory.
Via NBC:
LOS ANGELES — A suspect was in custody Wednesday night after federal and local agents seized more than 1,000 weapons at a home in one of the richest neighborhoods in the country, authorities said.
The man, whose identity wasn’t made public, was being held on suspicion of unlawful transportation and giving, lending or selling an assault weapon, said Lt. Chris Ramirez, a Los Angeles police spokesman. The man was expected to be booked Thursday morning, he said.
Police and agents of the federal Bureau of Alcohol, Tobacco, Firearms and Explosives discovered the rifles and pistols while serving a search warrant at the residence in the Holmby Hills area of west Los Angeles.