I think it will make 13 people on the line

First or Last seat i think.

Thursday

Number 2 gonna shout “White” first.
Because he can se Number 3 is wearing “Black” hat. And Number 1 can see Number 2 and 3. It means that criminal 1 know that number 3 wearing Black and 2 wearing White. But criminal 1 didnt shout any colour. So It gives number 2 a clue that number 1 wearing either Black or White. Since then criminal 2 realize that he is wearing the opposite colour from criminal 3.
Sorry about the english.

Turn the card “diagonally” then push It out through the entrance