86 year old Lawrence Loeffler was convicted by a jury for shooting to death his 83 year old wife Betty in their home in January.
It took the jury less than an hour to reach their verdict.
Deschutes County Circuit Court Judge Michael Adler told Loeffler, "Due to health, I don't know how long you will live, But I do know you will spend the rest of your life in prison."
Loeffler told police conflicting accounts why he shot his wife. He claimed she and her stepdaughter were plotting to kill him.