Blast at Wash. home kills husband and children of missing Utah woman

The husband and two sons of a missing Utah woman died in an explosion at their home Sunday, reported the Star Tribune. Police are calling the tragedy a murder-suicide.
Police believe Josh Powell, 29, intentionally blew up the home of Steve Powell in Graham, Wash. days after he lost a child custody hearing, said the Chicago Tribune.
A social worker was dropping off Powell's sons, ages 7 and 5, for a supervised visit, but was denied entrance into the home by Powell. Minutes later, she smelled gas and the house exploded Fire and Rescue Deputy Chief Gary Franz told CNN, according to the Chicago Tribune.
The fatal blast comes more than two years after Powell's 28 year-old wife, Susan, mysteriously disappeared from their home in West Valley City, Utah. Powell was the sole person-of-interest in his wife's disappearance, reported the Star Tribune.
Emails obtained to Powell's lawyer, Attorney Jeffrey Bassett, lead police to believe Powell planned the explosion ahead of time.