Buzzfeed Reports;

Madison Police Chief Mike Koval said during a news conference that the shooting happened after officers responded to reports of a man “jumping in and out of traffic, dodging cars and the like.” Police also received a report that the same man had been involved in a battery.
When the first officer arrived at an apartment the suspect had entered he heard what “sounded like a disturbance coming from within the home,” Koval said. The officer then forced his way into the apartment, Koval said, where the teen assaulted the officer.