BROOKFIELD, Wis. -- A man police suspected of killing three and wounding four by opening fire at a day spa was found dead Sunday afternoon after a six-hour manhunt that locked down a shopping center, country club and hospital in suburban Milwaukee.

Authorities said they believed the shooting was related to a domestic dispute. The suspect, Radcliffe Franklin Haughton, 45, of Brown Deer, had a four-year restraining order against him.

Brookfield Police Chief Dan Tushaus said Haughton died of a self-inflicted gunshot wound and was found in the spa, where his wife worked. Authorities initially believed Haughton had fled, and spent much of Sunday looking for him.

The shooting happened about 11 a.m. at the Azana Day Spa, a building across from a major shopping mall in Brookfield, a community west of Milwaukee. Authorities initially believed an explosive device was inside the building, but later said that was not the case.

The mall, a country club adjacent to the spa, a nearby hospital and other buildings were locked down as police searched for Haughton.

Shortly before authorities said Haughton's body had been found, his father, Radcliffe Haughton Sr., told The Associated Press that he had last spoken to his son a few days ago, but didn't have any indication anything was wrong. After learning of his son's death, he said, "This is very sad."

Tushaus said officers initially focused on reaching and helping the victims. The victims' names were not released by authorities, and the hospital treating them was temporarily locked down.

Online court records showed a temporary restraining order was issued against Haughton in Milwaukee County Circuit Court on Oct. 8 because of a domestic abuse complaint. Haughton appeared in court Thursday, when a no-contact order was issued and he was told to turn all his weapons over to the sheriff's department.

It was not clear who sought the restraining order.

Tushaus said at a news conference last night that Haughton had slashed his wife's tires two weeks before the shooting. It is not clear whether his wife was among the spa victims.

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