Al goes to the local grocery store intending to rob it.  He…

Al gоes tо the lоcаl grocery store intending to rob it.  He аpproаches the store office with pistol drawn.  When he reaches the office, he discovers no one is there.  He quickly opens the unlocked door, enters the office and steals payroll checks that are lying on the manager’s desk.  He leaves without being seen. What is the most serious offense Al has committed?