Beltway Sniper John Muhammed Executed in Virginia.

It's official.

JARRATT, Va. – John Allen Muhammad, the mastermind behind the sniper attacks that left 10 dead, was executed Tuesday night as relatives of the victims watched, reliving the killing spree that terrorized the Washington metro area for three weeks in October 2002.

He looked calm and stoic, but was twitching and blinking as the injections began, defiant to the end, refusing to utter any final words. Victims' families sat behind glass while watching the execution, separated from the rest of the 27 witnesses.

"He died very peacefully, much more than most of his victims," said Prince William County prosecutor Paul Ebert, who witnessed Muhammad die by injection at 9:11 p.m. at Greensville Correctional Center, south of Richmond. Muhammad, dressed in a blue shirt, jeans and flip-flops, had no final statement.

'Good Riddance' is about all I can say.

John Allan Muhammed, we are richer for having lost you.