we had recovered from john were not the same bullets that was removed from andy rich's house in greybull, wyoming. >> investigators found smudge marks on the inside windows of rich's jeep, similar to those caused by animals when pressing their noses against the glass. was it possible that rich used his car to transport helble's dog across town after the murder? police took keisha's noseprint in the same way they collect human fingerprints. each dog's noseprint is as unique as a fingerprint. >> unfortunately, we weren't able to get the type of smudges or prints actually from the vehicle that would enable us to do that, but it certainly was an interesting element that we pursued for some time. >> after several months with no forensic evidence and very few leads, the investigation into john helble's murder was starting to turn cold. so investigators turned to helble's dog for more information. >> as it turned out, that dog was going to play a very important part in solving john's death. bulldog: ah, the dog days of summer! time to celebrate with your mates, grill a few dogs-- eh, hot dogs.