A Hayden man told KCSD that he lost his .45 caliber Smith & Wesson pistol @ 15602 Rimrock Road Monday -- and he's afraid a school child picked it up. Michael Stallcup told deputies that he put his pistol and holster on top of his vehicle after snowmobiling with friends from the Rimrock Road address, between 3:30 and 4 p.m., and forgot about it until he arrived home, about 10 minutes away. When he saw that the pistol and holster no longer were on top of the truck, he returned to the Rimrock Road address and looked for it with his friends for a half hour. Earlier, he'd seen a school bus pull up to a nearby corner as he was leaving his friend's place. A school kid may have picked it up. Stallcup said his name and phone number are engraved in the leather inside the holster. However, no one had reported finding a gun, as of last night.