Pretty Big Worm!!!! - Help identify

[Aquattro]

Wayne, did the dead snails appear covered in slime? I had a three foot worm that ate snails. It would actually grab them and drag them back to the edge of the rock it lived in. I didn't realize what was happening until one morning there were 2 snails in the same spot. I investigated at night with a flashlight and saw the sucker. I made a trap and it dragged the trap to the rock. It built tunnels thru the sand that had a slimy coating to it and the thing could retreat like an elastic band snapping back into it's hole. I removed the rock, but never found the worm. It fits the description of yours though...