The chaotic incident sent people scrambling to flee from the spa, including one woman who ran, screaming, into traffic on Moorland Road.
"She ran right out into the street was pounding on cars," said David Gosh of West Allis, who saw the woman running into the busy street as he returned from duck hunting earlier Sunday with his father, John, and a friend, Ben Luedke.
Gosh said that moments later, a man with a handgun ran out and appeared to be chasing the girl.
Just then, Gosh said, police began streaming to the scene, and the gunman, seeing them, ran back into the building - or perhaps into the woods behind the building, where Westmoor Country Club is located.
"He was the shooter," Gosh said. "He was looking for an escape route."
Gosh and his father were fairly certain he returned to the building because they thought they saw him appear at an upstairs window and pull a shade down.
John Gosh said he then saw two women come out of the building who had been shot. Both were bloody, he said; one appeared to be shot in the leg and the other appeared to have been shot in the back.
A bystander in the east parking lot of Brookfield Square, identified as Christopher Pfeiffer, 47, of Brookfield, said he was coming from church at Spring Creek church in Pewaukee when he pulled into the Barnes & Noble bookstore and saw a young girl running in the aisles of the parking lot. It's not known if it was the same woman as Gosh saw.
"She was screaming, yelling, crying hysterical. She was pleading for help," said Pfeiffer said. "She kept saying, 'My mother was shot.' And she mentioned that there was a gunman. She ran into the bookstore and I followed her. But I watched her from afar."
Then he said law enforcement descended on Azana. The man said the young woman was barefoot; he assumed she was a patron at the spa.
Another man, Paul Moll, 64, of Milwaukee, was having lunch at the Red Robin Restaurant and said he just saw police car descend on the scene. He said he noticed someone was wheeled out of the spa building in a chair. He said he heard there was an active shooter inside.
Jenny Remshak, 22, of West Allis, was planning to shop at Boston Store. As she arrived by car, she saw a woman crawling out of the front door of the spa.
She said the woman crawled to the north of the building, where police were waiting.
"They scooped her up and put her in a cop car," Remshak said. "They were holding her and she was holding her arms together."
Remshak said it appeared the woman was wounded. The woman was later placed on a stretcher and was taken to a hospital.