Another thing you can do is stick weld the lock on his office door.
Stick welding is a lot easier than it sounds. All you need is a car battery, some wire, and some solder.
-jumper the negative terminal of the car battery to the door handle
-jumper the positive terminal of the car battery to a spool of lead solder
-begin welding by feeding the solder into the lock
-current flows from the battery, into the spool of solder, into the lock, into the door handle, and back into the battery
Wear protective gloves and goggles! If it makes a bunch of light, just look away. You don't need a UV face shield because you don't need to look at it while you're doing it.