An accomplice in the killings of a Kansas couple has been sentenced to prison.

Twenty-year-old Andrew Ellington was sentenced Thursday to life plus nearly 13 years for first-degree murder and second-degree murder in the deaths of Roger and Melissa Bluml. The adoptive parents of Ellington’s friend, Anthony Bluml, were shot outside their Valley Center home in November 2013.

Prosecutors say Ellington drove Anthony Bluml’s birth mother, Kisha Schaberg, to the Blumls’ home, where she shot the victims.

The Wichita Eagle reports Schaberg and Anthony Bluml wanted to rob and kill the couple, who adopted Anthony and his brother.

Schaberg and Anthony Bluml are serving life in prison with no parole for capital murder and aggravated robbery. A fourth suspect is scheduled for trial in September.