Vocabulary
die Polizei
nur Singular
die Polizei

police

Can you show me your ID? (formal)

die Fahrzeugpapiere

vehicle documents 

I’d like to report an accident. 

witness (male)

witness (female)

My wallet was stolen. 

valuables 

I’d like to testify. 

perpetrator (male)

perpetrator (female)

Can you describe the suspect? (formal)

physical assault 

Would you like to press charges? (formal)