WHEATLAND, Wyo. (AP) — A Wyoming man who killed his three young sons and brother and wounded his wife in a shooting rampage faces sentencing Tuesday.

The wife of Everett Conant III says her husband thought their neighbors were spying on him. Suzette Conant told investigators he wanted the curtains kept drawn.

The shooting happened in July, 2011, in the family's trailer home in Wheatland.

Conant killed his sons, 11-year-old Joseph, 13-year-old Charles and 18-year-old Everett. He also killed his brother, 33-year-old Nacuma Roland Conant.

Conant is 37 and faces life in prison. He has pleaded no contest to murder and attempted murder charges.

A judge ruled after repeated state mental health evaluations that Conant was competent to stand trial.