The Anonymous Phone Call

Acting on an anonymous phone call, Detective Mehul raid a house to arrest a suspected murderer. Detective Mehul doesn`t know what he looks like, but he knows his name is Jaikal and that he is inside the house. Detective Mehul bust in on a carpenter, a lorry driver, a mechanic and a fireman playing cards. Without hesitation or communication of any kind, he immediately arrested the fireman. How did Detective Mehul knew that fireman is Jaikal ?

The fireman is the only man in the room. The rest of them are women. The fireman is the only man in the room. The rest of them are women.