Authorities in western Iowa are trying to determine the origin of a humanjaw bone found on the bank of the Boyer river south of Denison. CrawfordCounty Sheriff Tom Hogan says the bone was brought into his office Tuesdayafternoon. Hogan says they then searched the area were the bone was foundwith a boat.Hogan says they found some other bones and possibly some clothing that theybelieve is linked to the jawbone. Hogan says the bones have been sent toIowa State University to be examined by a forensic scientist.