Ok.. an old riddle...?!

Ok.. an old riddle...?

There is a warrant of arrest by the NYPD.
Thy're set to raid the house & arrest a man named John.
None of them knows what John looks like.
when they get into the house there were 4 people playing cards:
a Fireman; a Carpenter; A Guitarist, & another Police Officer.

Who do they arrest & why?

1 week ago
no correct answers yet.
who's the only male?
not the policeman.

1 week ago
i mean, not the police officer..

the fireMAN