At least six people dead, including gunman from shooting at Molson Coors in Milwaukee

At least six people dead, including gunman from shooting at Molson Coors in Milwaukee

When a brewery employee gunned down five co-workers at Milwaukee's Molson Coors campus, then killed himself, it was the first mass shooting at a workplace involving a current or former employee in 2020.

The incident marked the 13th mass workplace shooting by a current or former employee since 2006, according to a database of mass killings maintained through a partnership between USA TODAY, The Associated Press and Northeastern University.

"Mass shootings are a rare event and at a workplace even rarer," said James Alan Fox, a professor of criminology at Northeastern who tracks the data.

In 2020, there have been more than 2,300 gun violence deaths, which doesn't include more than 3,800 by suicide, in the USA, according to the Gun Violence Archive.

Since 2006, 90 people have died in the 13 mass workplace shootings, according to the USA TODAY, AP and Northeastern database.