Maybe that isn't the guy. They found his information under the seat of the truck that was used to kill those people.

So he goes to Poland he steals a full truck he kills the driver and puts his body into the truck. He kills all those people but then he leaves his personal info under the seat.

The first part he handled like he knew what he was doing. Then he leaves his info under the seat like he was a retarded.

I got to believe the info he left behind belonged to someone else probably a dead man.

I think they can't find him because they are looking for the wrong guy.