article_snippet: Here's what we know about the Friday night shooting.
article_snippet: And we know how many were fired.
article_snippet: Under the Wisconsin Professional Police Association law, officer-involved shootings are investigated by an outside agency, in this case the Division of Criminal Investigation.
article_snippet: Once this case the Division of Criminal Investigation completes this case the Division of Criminal Investigation investigation, the report will go to the local district attorney, Koval said.
article_snippet: What this is about is finding out exactly what happened that night and to determine, then, responsibility," his nephew told CNN's "AC360."
article_snippet: CNN's Rosa Flores, Gary Tuchman, Brianna Keilar, Ralph Ellis, Joe Sutton and Greg Botelho contributed to this report.