Delaware Attorney General Beau Biden said that the shooting was the result of a custody dispute.

BBC: Three dead in Delaware courthouse shooting

Beau Biden, the senator's elder son, is the state's attorney general.

NPR: Has Biden Gone From Snarling To Darling?

Do you think it says anything about the political climate the Democrats face that Beau Biden, the Vice President's son, declines to run for U.S. Senate in Delaware?

WHITEHOUSE: Press Briefing

"Beau" Biden, Delaware's Attorney General and the son of the vice president, spoke at a news conference about the shooting.

CNN: 2 women, gunman killed in Delaware courthouse shooting

His son Joseph "Beau" Biden, Delaware's attorney general, is a captain in the Army National Guard and will soon return to Iraq.

CNN: Analysis: Biden gives Obama old-school cred