By JUAN A. LOZANO
Associated Press

HOUSTON (AP) - A prosecutor has told jurors that a man who claims he was insane when he fatally shot six members of his ex-wife's family in suburban Houston understood that he was doing wrong.

Prosecutor Samantha Knecht said Wednesday during closing arguments at Ronald Lee Haskell's capital murder trial, that Haskell planned for months the "cold-blooded execution" of the Stay family at their home in 2014.

Doug Durham, one of Haskell's attorneys, told jurors that Haskell committed a terrible crime, but that he didn't know what he was doing was wrong because of mental illness.

A couple and four of their children were killed in the shooting. A fifth child, teenager Cassidy Stay, was shot in the head but survived. Stay, who is now 20, testified at the trial.

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