The mass shooting — one of several in the U.S. in recent days — happened at Somers House Tavern near Kenosha.
Officer Rusten Sheskey came back to active duty on March 31 after shooting and paralyzing the 29-year-old Blake in August.
"Rarely does our community see accused murderers roaming about freely,” prosecutors warned the court in a filing Wednesday.
Prosecutors want the accused Kenosha, Wisconsin, shooter's bail conditions tightened after a Jan. 5 bar outing caught on camera.
The federal civil rights probe will make a decision independent of the Kenosha County district attorney in Wisconsin.
Officer Rusten Sheskey shot the 29-year-old Black man in the back seven times, paralyzing him.
The "Silver Spoons" and "NYPD Blue" actor donated $150,000 to help free the teen charged with killing two people during a Wisconsin protest.
The 17-year-old faces murder charges for killing two people and injuring a third during a protest in Kenosha, Wisconsin, this summer.
Dominick David Black bought the AR-style rifle allegedly used to kill two people during Kenosha protests because Rittenhouse wasn't old enough, authorities said.
The 17-year-old faces a potential life sentence for fatally shooting two protesters in Kenosha in August.