was type a, laura's blood type. a police bloodhound named sherlock was given some of laura's clothing to establish her scent. when sherlock was released from his cage, he went directly to the tree where police had found the bloody pillowcase. the bloodhound followed the scent through a church parking lot, through a residential area, and straight to the back door of laura's home. >> the dog had a very strong track and actually ran the distance, which indicated to us that he was very definitely on the scent of laura. >> police suspected foul play, but they had no suspects. >> we spoke to everyone that we could that had seen laura or knew laura within the last year or two, and no one could give us any reason for anyone to want to