John Tullman: Letective Adventures!

You decide to inspect the safe.
The safe is a sturdy metal box about three feet tall and two feet wide. It has a sleek silver finish so shiny that the light reflecting off of it blinds you. You see a logo on the front of safe that reads: "Safe Inc.". It's most likely the company that created the safe. As for security, the safe seems quite secure- there is a combination lock, a number lock, a second combination lock, and finally, a lock that requires a key to open.
You notice that the safe is unlocked. You open it slightly and take a look inside. You see a large velvet cushion that takes up 2 feet of the safe. There is a hole in the cushion- presumably a place to put something very important inside. However, there's nothing in the hole- and besides the large velvet cushion, there's nothing else in the safe!
Harmon notices your confusion. "Uh, you might be wondering why there's nothing in it... it's because the item inside of it was stolen. My precious harmonica was inside this safe, until it was taken. I made sure that every single lock was locked last night. The culprit was somehow able to open all of them."
You take note of this in your notebook:
"Harmonica was stored inside safe. Seems to be very secure- 2 combo. locks, 1 num. lock, 1 key lock. Culprit was able to open all of the locks."
What do you inspect next?