A Sonoma County man convicted of killing his sister's boyfriend last year in the couple's Alexander Valley home was sentenced Friday to 50 years to life in prison.

Jarrod Miller, 30, was found guilty by a jury of first-degree murder in the shooting death of Timothy Neuer, 29, on March 8, 2011.

"It was a heinous crime that resulted in tragedy to two families," said District Attorney Jill Ravitch, who tried the case with a deputy prosecutor. "But in the end justice has been served."

Miller, an ex-Marine who grew up on the Russian River, contended he was acting in self-defense and suffering mental illness.

He claimed he was afraid of Neuer, a childhood friend who ran a commercial marijuana growing operation.

But prosecutors said Miller planned the murder after Neuer and Miller's sister, Mandy Miller, criticized him for being a "mooch" and kicked him out of their house.

Just before the killing, he rented a car, drove to Nevada and bought a handgun at a sporting goods store.

He confronted Neuer in the living room of his house and shot him three times as Mandy Miller looked on.

Jarrod Miller was arrested the same night a few miles away. Police recovered the .380-caliber pistol after he threw it out the window of his pickup on Old Redwood Highway.

His sister and another witness testified against him at trial.

Miller was sentenced to 25 years for the murder and 25 for the use of a gun.

Prosecutors played a video of Neuer's life and a friend of Mandy Miller read a statement at the sentencing.

You can reach Staff Writer Paul Payne at 568-5312 or paul.payne@pressdemocrat.com.