MADISON, Wis. (AP) — Police say the suspect in a Wisconsin workplace shooting that seriously injured three people had his concealed-carry permit revoked and was unable to legally purchase a firearm.
Middleton Police Chief Chuck Foulke said Friday that 43-year-old Anthony Tong had "contact" with police in South Dakota in 2004 that involved a mental health issue.
Foulke didn't give details of the South Dakota incident, but he cautioned against concluding that mental health was an issue in Wednesday's shooting at WTS Paradigm in Middleton.
Foulke says police still don't know what motivated the attack.
Authorities say the conditions of three workers shot by a colleague at a Wisconsin software company are improving.
UW Health said Friday that the three patients have been upgraded from serious to fair condition at University Hospital in Madison. Police say the woman and two men were shot Wednesday morning when a co-worker opened fire inside WTS Paradigm in Middleton.
The gunman has been identified as 43-year-old Anthony Tong. He was fatally shot by police responding to the incident.
A fourth employee suffered a graze wound during the attack .
Middleton Police Chief Chuck Foulke says investigators still don't know what prompted the attack. Tong had worked at WTS Paradigm since April 2017 and had no criminal history in Wisconsin.
Police don't know if the victims were targeted or shot at random.