Call the police.
The police made the witness explain in detail how the accident had happened.
The police spent hours searching Tom's place, but they couldn't find the murder weapon.
He suddenly took a defiant attitude toward the police officer.
Police immediately sealed off the streets around the hotel as they searched for the bomb.
Racial profiling is a controversial police tactic.
In London, the police are always worried about finding a bomb on the train or subway.
A burglar broke into the convenience store last month, but I heard the police caught him yesterday.
He was taken away by four police officers in the middle of the night.
The man who she knew was wanted by the police suddenly appeared at the back door.
Tom didn't leave a suicide note, so the police suspect murder.
The police think that Tom was stabbed before his throat was slit.
Our city police have a new campaign targeting drunken driving.
Having all of you here is more reassuring than having the police or anybody else.
It is not evident whether the police followed the usual search procedures.