Haskell has previously been accused by relatives of abuse and threats, according to police records obtained by ABC News. Haskell's mother, Karla Jeanne Haskell, told police in San Marcos, Calif., on July 3 that she wanted a restraining order against her son after a ferocious argument that began when she told him that she was in contact with his ex-wife, court documents state.
She said that he forced her into the garage and tied her wrists with duct tape before taping her to a computer chair.
"He yelled at me and twice placed his hands around my neck trying to choke me and caused me to pass out," Karla Haskell, 61, said, according to the court documents. "He told me he was going to kill me, my family and any officer who stops him. He hid my telephones. I was taped up for four hours."
There is no record of Haskell being arrested for the alleged assault on his mother.
Police reports in Utah indicate that Haskell's ex-wife Melanie Kaye Haskell was also the victim of violence. Ron Haskell was charged with domestic assault on June 5, 2008 after his wife called the police saying that he had dragged her out of their bedroom by her hair and repeatedly punched her in the head.
The Logan City Police Department report states that she then decided to go and sleep in their children's bedroom, but he followed her in there and pulled her out of the room by her hair once more, continuing to punch her in the head.
Police booked him on domestic assault and domestic violence in the presence of a child because the couple's children, aged 3 and 5 at the time, were present. He made bail and was released five hours later. It's not clear how the charged was adjudicated.
The final issue that the Logan City Police Department was involved in was a protection order violation. His wife had been awarded a protection order in July 2013 and on Oct. 8, 2013, she called in a protection order violation because he had showed up at one of their children’s' schools.
The wife filed for divorce months later – on Valentine's Day.
Jonathan Ricks, a family friend, says he remembers Katie Stay discussing her sister’s troubled marriage.
“Katie had told me on one occasion how her sister was leaving an abusive relationship,” Ricks said.
Tom Stay, Stephen Stay’s father, told KABC that he never expected this sort of trouble from Haskell.
“He was in a good home, brought up in a good family, they taught him the gospel and he understood what was right and wrong,” Tom Stay said. “And he was a good boy, but how he changed … you just don’t know.”