Hint 1: Hmm. Bob’s phone is password protected, but it seems he may have been trying to communicate something in his dying moments that may help us in his crime scene photo.

Hint 2: In the crime scene report I have of Bob, he drew out four shapes: a triangle, a square, another triangle and a pentagon. I wonder how these could help us find the four-digit password to his phone.

Hint 3: What would be a simple way to convert shapes into numbers? I might start by counting how many sides each one has.

Need help with the final answer? Click here!