Meanings
Usage patterns
警察に届けるto report something (e.g. a lost item or crime) to the police
I found a wallet, so I reported it to the police.
警察を呼ぶto call the police
I saw a burglar, so I called the police.
警察に捕まるto be caught/arrested by the police
He was caught by the police for speeding.
警察に行くto go to the police (station)
I went to the police to file a report.
〈事〉警察a self-appointed enforcer/busybody about a particular topic
He always acts like a manners police, criticizing people's behavior.