You should report people if they do something wrong.
Katie has become a witness to a crime committed by someone who lives in her apartment complex and the police are asking the tenants for information.
Katie wants to keep her name out of the report.
Katie avoids talking to the police but later submits an anonymous tip.
Katie tells the police that she didn't see anything when they ask her.
The criminal is put behind bars thanks to the tip she sent in.
The criminal is unpunished and continues to commit similar crimes.