WICHITA, Kan. (AP) — The last of four people charged with fatally shooting a Kansas couple in 2013 has been convicted.

Twenty-year-old Braden Smith pleaded guilty Monday to two counts of second-degree intentional murder in the fatal shootings of Roger and Melissa Bluml. The couple was the adoptive parents of his friend, Anthony Bluml, who was sentenced to life in prison without the possibility of parole in the slayings.

Smith testified last summer that he provided the guns used to shoot the Blumls on Nov. 15, 2013, outside their Valley Center home as part of a plan to collect life insurance.

The Wichita Eagle reports that an initial count of capital murder was reduced and other charges were dropped in exchange for Smith’s testimony.

Sentencing is scheduled Oct. 29.