In The LEGO Movie, Lord Business wanted Bad Cop to use the Kragle on his parents. Bad Cop's good side didn't want to do it causing Lord Business to use nail polish remover and a q-tip to remove Bad Cop's good face. Afterwards, Bad Cop used the Kragle on his parents. After the Kragle was destroyed, Bad Cop reunited with his parents.
This is a description taken from LEGO.com. Do not modify it.
Bad Cop’s parents are a pair of simple, honest country police officers. There isn’t a lot of law-breaking in the towns, farms and villages outside of Bricksburg, but all of their neighbors consider them to be good and cherished pillars of the local community. Ma and Pa Cop are both very proud of their son’s work in the big city, although sometimes they worry about whether he listens enough to his good side.