SKOWHEGAN, Maine (AP) — A jury has swiftly convicted Luc Tieman of killing his wife and burying her body behind his parents' home.

Luc Tieman took the unusual step of presenting his own closing argument Monday, telling jurors he didn't kill "my beautiful wife." He said there were "alternative explanations" to the state's evidence.

Jurors deliberated for less than an hour. There's no sentencing date.

The Fairfield man originally told investigators his wife disappeared at a Walmart but changed his story to say she died from a heroin overdose. An autopsy showed she actually died from two gunshots.

Valerie Tieman was buried behind the home of her husband's parents in a shallow grave. The grave also contained a bag of potato chips, a bottle of perfume and an apologetic note.