You've been working for 5 years, but your salary has not changed in 3 years. Your lunch money has gone missing, and you suspect your coworker, Bob, is behind it.

As you sit at your desk, you notice a suspicious-looking cookie crumb on your keyboard. It's from the same type of cookie you had for lunch last week.

You approach Bob, who is sitting across from you, and ask if he's seen anything unusual. He claims he's never seen any cookie crumb, but you notice he's trying to stifle a cough.

You have the following options: