It was a sixth medal for the family -- Katy has three for the Czech Republic and Matt has previously won a gold and a silver medal in the 50-meter prone event.

A gold medalist found himself at the center of another controversy Monday as Kenyan police confirmed that steeplechase winner Ezekiel Kemboi was under investigation on suspicion of trying to stab a woman on a date before he left for the Games.

The woman accused Kemboi of making sexual advances, said deputy police spokesman Charles Owino, without naming the alleged victim. Kemboi is a police officer himself, according to Owino.

Kemboi said that he was the victim of attempted extortion and that police had not given him a fair hearing, Owino said.

And the International Olympic Committee announced that it disqualified American judoka Nicholas Delpopolo from the men's 73-kg judo event for a doping violation. It stripped the 23-year-old of his seventh-place finish after he tested positive for a cannabis byproduct.