"'Are your Photoshop skills good enough to solve a murder?' That's the challenge Photoshop threw to its Facebook fans last Halloween in the form of a Photoshop Murder Mystery. Fans downloaded the crime scene—a heavily layered Photoshop file—and scoured it for clues. This global army of designers-turned-detectives then converged on Photoshop's Facebook page to share their findings, swap Photoshop tips and tricks, and ultimately solve the mystery."