Unknown Larva

I found two of these during a river continuation project for my biology class. I had the teacher, an entomologist and several peers look at it without hope of identification. I was curious to know if any of you know what it is? It almost looks like a carpet beetle larva, but its' anterior and posterior ends and segmentation is wrong. I only need the order and if it's a shredder, scraper, hunter, gatherer. It was found in northern most California, in the Klamath River. It's only a centimeter or so in length. Any help would be absolutely fantastic.