a wednesday-evening riddle *solved*

Day 2,325, 10:20 Published in Austria Austria by exkrementensammler

The first who solves the following riddle will be rewared with a little surprise:

After the police received an anonymous phone call, they rushed a house to arrest a suspected killer. They didn't know what he looked like - they only knew his name was Christfried and that he was inside the house.
The police busted in on a politician, a doctor, a taxi-driver and a fireman all playing poker. Without hesitation or communication of any kind, they immediately arrested the fireman.

How did they know they've got their man?

Good Luck everyone!

(for eAustrians only!)
Der Rechtsweg ist ausgeschlossen.



aaaaaaaaaaaaaaand the winner is: Anders Danielson.