A California man who shot his wife and sister in what police said were mercy killings has been sentenced to 100 years to life in prison.

Lance Anderson was sentenced Wednesday after being convicted of first-degree murder.

Prosecutors say the 63-year-old Anderson shot his 68-year-old wife at their Canyon Country home in 2013 and then killed his 58-year-old sister, who was bedridden, at a Los Angeles nursing home.

Police have said the deaths were mercy killings.

Anderson told investigators that he killed his wife because she had brain damage, breast cancer and other health problems.