From the Yuma Sun, “Dome Valley shooting and house explosion was plan to kill or injure sheriff deputies“
“The motive behind their plan is not known, but it was clear they fully intended to murder as many deputies as possible prior to taking their own lives,” Bratcher said. “These people absolutely had a plan, and I think they wanted to die and make as big of a scene as they could possibly make.”
The Pima County Medical Examiner’s Office, which performed a forensic autopsy on the remains, has positively identified the couple as Jesse Lee Firestone, 65, and his wife Diedre Firestone, 45. The cause of death was listed as suicide from intentional blast and from thermal injuries.