Investigators searched a Riverside home Wednesday for possible explosives after a woman was found living there in squalor and one man was arrested on suspicion of elder abuse, according to the Riverside Police Department.
Police first received a call Tuesday about 2 p.m. warning of a man firing a gun in the front yard of a home located in the 8200 block of Oakhurst Place (map), Riverside Police Lt. Guy Toussaint said.
Officers arrived and took a 46-year-old man in custody.
While searching the home, police discovered an elderly woman living in squalor and "items indicative of explosives," Toussaint said.
Investigators with the ATF and FBI were at the home until sunset on Wednesday. Citing the dangers of working with possible explosives in the dark, investigators said they would return to the home in the morning.
Neighbors were evacuated while the investigation was under way. They were allowed back into their homes Wednesday night after investigators left, but residents will have to leave again Thursday morning when agents return.
Aerial video showed officers using a robot as part of the search. Two light-yellow tarps were laid on the sidewalk with several pieces of what appeared to be evidence placed methodically on top of them (pictured below).
William Lawrence Hunziker of Riverside was arrested on suspicion of elder abuse, Toussaint said. His relationship to the woman was unclear.