MILWAUKEE -- A U.S. woman whose husband killed her and two others at the spa where she worked said he threatened to throw acid in her face and jealously terrorized her "every waking moment," according to court documents.

Authorities say Radcliffe Franklin Haughton, 45, killed three women, including his 42-year-old wife, Zina Haughton, and wounded four others Sunday before turning the gun on himself.

In a written request for a restraining order filed Oct. 8, Zina Haughton said her husband was convinced she was cheating on him and that aside from the acid threat he also vowed to burn her and her family with gas. He said he would kill her if she ever left him or called the police, according to the court papers obtained Monday by The Associated Press.

"His threats terrorize my every waking moment," she wrote.

In a separate police report, she said the couple was in the process of getting a divorce and "we are always arguing."

Haughton was arrested earlier this month for slashing his wife's tires; she was granted a four-year restraining order on Thursday.

Under the order, Haughton was prohibited from owning a firearm. But police said Monday that Haughton bought the .40-calibre semiautomatic handgun used in the deadly shooting two days later.

Haughton, of Brown Deer, was charged with disorderly conduct last year after police officers responding to a call saw Haughton point what appeared to be a gun at his wife, Zina, from a window at their home. Officers took cover, and a 90-minute standoff ensued.

Brown Deer police said Monday the standoff ended peacefully, and they were never able to confirm a gun was involved because Zina Haughton wouldn't allow them into the couple's home. The charge against Radcliffe Haughton was dropped when a police officer failed to appear in court.

Police said the officer asked the prosecutor to reschedule, but the prosecutor refused. A call to the prosecutor Monday evening rang unanswered.

According to court records, Zina Haughton called police and said that her husband had thrown her clothes and bedding into the yard and poured tomato juice on her car.

Customers described Zina Haughton was a popular hair stylist who decorated her work station with photos of her two daughters.

"She was a wonderful mom," Kristin Guadagno told the Milwaukee Journal Sentinel. "She had two daughters who were the foundation of her family. She was their everything. She worked so many hours every week to provide for them and take them on nice trips."

The shootings that happened about 11 a.m. Sunday triggered chaos in the commercial area around the spa. Believing Haughton had fled, police began a massive, six-hour search that locked down a nearby mall, country club and hospital.

It was the second mass shooting in Wisconsin this year. Wade Michael Page, a 40-year-old Army veteran and white supremacist, killed six people and injured three others before fatally shooting himself Aug. 5 at a Sikh temple south of Milwaukee.