When you finish eating in the mess hall, place the eating equipment in the pockets of your prisoner uniform. When you are being leaded back to a cell, repeatedly stab the guard whilst he is unlocking your cell.
Take gun and keys from cop and hide in a supply closet (lock it too).
"Where areas he?!" The officer shouts."I saw him go into the closet!" Henry, your straight-forward enemy tattles."Which one?!" Another officer shouts.
>As you jump out, you see 5 guards, and prisoners staring in awe.INVENTORY: Prisoner uniform, Pistol, 100 rounds, key chain, Pretzel crumbs