reporter: sheriff, i ve got to ask you, is that possible that mexico is going to find, catch and adjudicate the killers in what is a lawless part of mexico? i really cannot answer that, but i can tell you this, based on their past record, i think they have a somewhat of a zero solvency rate and a zero conviction rate. reporter: there is one more piece of evidence. a small blood spot on the life jacket tiffany hartley wore the day she says her husband was shot. the blood is from her husband. sheriff gonzalez says a dna test confirms it, but even the dna match remains just one more piece of an unsolved puzzle. there is still no body, no jet ski. is tiffany hartley even telling the truth? or is there another secret yet to be told?
ashore. it s too many people involved for it to be a conspiracy she d be paying people. reporter: the sheriff believes tiffany s story and witnesses confirm it. reporter: you don t believe the hartleys were involved in drugs, that there s an insurance scam involved? where s the body? reporter: you don t believe tiffany hartley herself may have executed her husband. i don t think so. reporter: and now even more evidence tiffany hartley is telling the truth. a surveillance photo taken that very afternoon, one hour after the attack. fitting the description given by tiffany hartley and what gonzalez is information the mexican sheriff had from the very first day. reporter: sheriff, i ve got to ask you, is that possible
in what is a lawless part of mexico? i really cannot answer that, but i can tell you this, based on their past record, i think they have a somewhat of a zero solvency rate and a zero conviction rate. reporter: there is one more piece of evidence. a small blood spot on the life jacket tiffany hartley wore the day she says her husband was shot. the blood is from her husband. sheriff gonzalez says a dna test confirms it, but even the dna match remains just one more piece of an unsolved puzzle. there is still no body, no jet ski. is tiffany hartley even telling the truth? or is there another secret yet to be told? [ paper rustles, outdoor sounds ]
be paying people off. reporter: the sheriff believes tiffany s story and witnesses confirm it. you don t believe the hartleys were involved in drugs? no. you don t believe there is an insurance scam going on? where s the body? reporter: you don t believe tiffany hartley herself may have executed her husband. i don t think so. reporter: and now even more evidence tiffany hartley is telling the truth. a surveillance photo taken that very afternoon, one hour after the attack. if you notice there on the front of the boat, you see bundles of marijuana there. reporter: it shows a small boat and a group of men, one in a black shirt fitting the description give by tiffany hartley. and what sheriff gonzalez is information the mexican sheriff had from the very first day. reporter: sheriff, i ve got to ask you, is that possible that mexico is going to find, catch and adjudicate the killers
we re kind of in the middle of the lake. and then that s when he motioned that we needed to go. reporter: did you see something in his eyes that said, this could be serious? i could just tell by his body language. you know, i saw him and he was just kind of we got to go. like, this is serious, but he stayed behind and stayed between me and the boats. reporter: you think, protecting you? hmm mm. reporter: it was now a chase. tiffany says her jet ski was going at least 65 miles an hour. they were racing for the other side, for the u.s., for safety. i mean, were you scared? were you frightened at that moment? oh, oh my gosh. yeah. reporter: you thought these guys are coming after us? uh-huh. reporter: three boats closing from two directions, but not catching up. tiffany thought they would