One protestor also threw a restaurant sign at a patron and struck him in the head.
The Saturday morning verdict was met with mostly peaceful protests before demonstrations turned increasingly aggressive during the night. Since then, at least 71 people have been arrested, according to Cleveland Police Chief Calvin Williams.
During a Sunday press conference, Mayor Frank Jackson thanked protestors who remained peaceful and expressed that the city will continue defending their First Amendment rights, but it will not tolerate those who engage in violence.
Police say that by Saturday night, many protestors remained unruly but did not resort to the kind of actions seen recently following police killings in Baltimore and Ferguson, Missouri.
Brelo, who is at the center of recent violence in Cleveland, faces administrative charges and remains suspended without pay.