There may be no better example of overcriminalization than the 2014 arrest of Melek Ustunluk in Passaic, New Jersey for the crime of braiding hair without a license. Taylor Tiamoyo Harris had this story at NJ.com in May on the controversy and the bipartisan legislation then going through the New Jersey Legislature to fix it.
Well, Governor Phil Murphy vetoed the bill. The WSJ has this editorial titled A Hair-Brained Veto.
Eric Garner would be another excellent example, and it cost him his life.