It's Not the Badge You Wear, It's the Badge in Your Heart
The brutal attitude held by man law enforcers isn't instilled by the badge that they wear but by the badge that exists in their hearts:
An analysis by The Intercept, using data from the Fatal Encounters project, found that plainclothes cops play a role in such killings disproportionate to their relatively small numbers among the NYPD’s ranks. Plainclothes police have been involved in nearly a third of all fatal shooting incidents recorded since 2000, according to The Intercept study.
There have been at least 174 fatal shootings by on-duty New York City police officers since 2000, according to an analysis of data from Fatal Encounters, a website that tracks deaths involving police. Plainclothes or undercover police were involved in 54 of those deaths, while uniformed police were involved in 41 fatalities. Eleven cases involved both uniformed and plainclothes cops. (Three of the shootings were self-inflicted.)
There is a lot of speculation one could make about this but at this point I just find it to be an interesting statistic. The New York Police Department has a reputation for brutality and it appears that that reputation doesn't cease when an officer exchanges his uniform for street clothes.