Wife of victim's widower arrested over US 1990 'killer clown' murder

American police are investigating a murder in 1990 by a "killer clown" have arrested a woman who later married the widower of the victim.

Police in America are investigating a murder in 1990 by a "killer clown" have arrested a woman who later married the widower of the victim.

Detectives said advances in DNA technology, combined with evidence gathered decades ago, show Sheila Keen Warren, now 54, was the clown.