Whose face was used for Michael Myers' mask in "Halloween"?

For his mission, Wallace boldly went where many indie film productions had gone before–a random shop on Hollywood Boulevard. It was there that he spotted a perfectly innocent William Shatner Captain Kirk mask and thought "Yeah, this is the face of a killer." I mean, not exactly. The mask needed a few changes like spray painting it white, messing with the hair, and enlarging the eye holes until it looked sufficiently creepy. Nick Castle spent the entire shoot cramming the mask into his back pocket between takes, and producer Debra Hill kept it in a shoebox under her bed for years while chain smoking, which gave it that lovely yellow tint you see in "Halloween II." William Shatner remained completely clueless that his face was terrorizing audiences until years later when someone casually mentioned it during an interview, but he's flattered to be connected to the franchise. Captain Kirk saving the galaxy by day, haunting your nightmares by night.