Milwaukee Police Chief Alfonso Morales oversaw several ethical violations among his staff before he ordered his officers to fire tear gas at protesters.
The Democratic candidate won't travel to the party's convention due to coronavirus concerns.
To date, 230 people have died in Wisconsin and nearly 4,500 have tested positive.
Current and former employees say other racist acts took place at the Milwaukee facility where the shooter killed five people and himself last week.
An employee killed five fellow workers — sons, husbands and fathers — at a Molson Coors brewery in Wisconsin.
Police say a 51-year-old employee of the brewery opened fire on his co-workers, killing five people before turning the gun on himself.
“This is a tragic day for our city, for our state,” Milwaukee Mayor Tom Barrett said.
As Trump bragged of killing that "son of a bitch" during a campaign rally, Democratic candidates describe the murder the Iranian general as reckless.
The boy and girl, ages 12 and 13, were hospitalized for non-life-threatening injuries, Milwaukee police said.
Clifton Blackwell allegedly threw acid in Mahud Villalaz's face after telling the U.S. citizen to go back to his country.