BROOKFIELD, Wis. — A Wisconsin man who had been accused of domestic violence and slashing his wife’s tires took a gun into the spa where she worked Sunday and shot seven women, three fatally, before killing himself, a police chief said. The shootings set off a confusing, six-hour search for the gunman that locked down a nearby mall, a country club adjacent to the spa and the hospital where the survivors were taken. The search froze activity in a commercial area in Brookfield, a middle-to-upper class community west of Milwaukee, for much of the day. Ultimately, he was found dead …