The Pinal County Sheriff's Office said deputies responded to the shooting around 1 a.m. Saturday to a neighborhood around the Saddlebrooke adult community in Tucson. Saddlebrooke is located near the Santa Catalina Mountains in Southern Arizona.
PCSO spokesman Tim Gaffney said the 68-year-old man found his wife, 63, and 22-year-old Stephen Trevor Chapman sleeping together in their small guest house.