14-year-old son arrested in ICE agent's slaying

Updated at 2:50 p.m. ET: The 14-year-old son of Immigration and Customs Enforcement agent Myron W. Chisem was arrested Thursday morning after the agent was shot dead through the back of his head in the family room of his Carson, Calif., home.

Authorities from the city about 16 miles south of downtown Los Angeles responded to a 911 call about 9 p.m. Wednesday. The caller told dispatchers his father had been shot.

"We do believe (the son) made the 911 call," said Lt. Holly Francisco.

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Chisem, an ICE Homeland Security Investigations special agent, was identified as the victim, according to an ICE statement obtained by NBC News. ICE is part of the Department of Homeland security.

A Navy veteran, Chisem, 42, had been assigned to the HSI Los Angeles Office since he joined the agency in 2007. He is a native of Torrance, Calif., the agency said.

Nick Ut / AP

U.S. Immigration and Customs Enforcement agents wait for the coroner's van at the Carson, Calif., home of slain ICE agent Myron W. Chisem. His 14-year-old son was arrested in the shooting death.

A preliminary investigation indicated the fatal round was fired from outside the home and through a window, investigators said. The agent's service weapon was used in the shooting, according to investigators. No motive was offered.

A news helicopter showed ICE agents lining the driveway and saluting as the body, covered by an American flag, was wheeled to a coroner's van.

"This is a difficult time for ICE, especially for the family and loved ones of the agent. Please keep them in your thoughts and prayers," ICE Director John Morton said in a statement.

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