It was not known if employees at the office were targeted or how many times the gunman and police fired their weapons. The gunman, who Foulke said had no criminal past and no previous contact with the police department, died at UW Hospital, Foulke said.

A witness to the shooting who works for WTS Paradigm but asked not to be named told the Wisconsin State Journal the shooter was a company employee.

The witness was moved safely to a nearby hotel after police arrived at the scene. The witness, his voice still shaking, said he texted his wife “Oh my God” just after the shooting began and sheltered in place in a room, where he heard about a dozen gunshots from what sounded like a handgun before police arrived.

He said he kept thinking, “The walls in the office aren’t thick enough.”

He didn’t survey the scene in the office as he was being escorted out but said he saw one woman with a shoulder wound being taken to an ambulance.

“She was definitely in pain,” he said.

WTS Paradigm’s office has about 160 employees at that location, he said.