One big mystery behind the gunman who killed five people in Santa Monica is how he got his weapons.
Federal authorities recovered two weapons from John Zawahri – a semiautomatic rifle and an old “black-powder handgun,” The Los Angeles Times reports.
Authorities also are trying determine how he amassed a large collection of ammunition.
“We’ve been at his house, going through his computer too,” said the official, who requested anonymity because the case was ongoing.
The L.A. Times reported that Zawahri has a history of mental illness.