A termination meeting, a burst of violence and a terrible toll: Aurora police describe mass shooting at Henry Pratt Co.

The 911 calls came in a flurry starting at 1:24 p.m. Friday. An employee who had just been fired was shooting up Aurora’s Henry Pratt Co., the callers said.

Police officers arrived four minutes later and almost immediately encountered gunman Gary Martin, a 45-year-old with a history of violence...