Ian David Long was a former military machine gunner who apparently killed himself after the Wednesday night attack in Thousand Oaks, California.
Federal agents in California raided a marijuana grow house that was suspected of funding the MS-13 gang in Fresno County.
An ISIS suspect who has lived in the U.S. since 2016, faces a hearing in federal court as part of the government's efforts to extradite him back to Iraq.
An acquaintance of the woman killed in a California office explosion has been arrested on suspicion of possessing an unregistered destructive device.
An explosion that rocked a medical office building on Tuesday, killing a woman and injuring three other people, is being investigated as intentional.
An elusive serial killer was caught when investigators matched crime-scene DNA with genetic material stored by a relative on an online genealogical site.
A man once sworn to protect the public from crime was accused Wednesday of living a double life terrorizing suburban neighborhoods at night, becoming one of California's most feared serial killers and rapists.
President Trump has threatened to upend a tentative agreement between the state of California and federal officials to mobilize National Guard personnel and send them to the Mexican border.
California Gov. Jerry Brown has rejected terms of the National Guard's initial deployment to the Mexican border, but a state official said nothing was decided.
The administration is asking California, Arizona, New Mexico and Texas to send Guard troops immediately. Will California comply?