to take pictures of old guerrero? why wasn t there far more blood evidence? the jet ski the jet ski was destroyed. my understanding, the jet ski was taken apart. that parts that would float were burned and buried afterwards. and the parts that would not float were just thrown into the lake and of course, they sunk. this is coming in from mexico. reporter: the sheriff believes hartley s story but may never be able to prove it. david hartley s mother can barely control her emotion. what happened to david and tiffany was an act of terror. plain and simple. it was a senseless violence, but it was an act of terror. and that is not going to end at the border. it s over here already. reporter: and for tiffany herself, it is even more troubling.
drug smugglers. only people with jet skis are involved with dope. right. reporter: clearly nervous, colette barely slowed down as we approach the church tiffany and david hartley visited on september 30th. he turned the boat and gave us 30 seconds to take the pictures at the exact spot tiffany hartley said they had stopped. this is the last place they came to at the old guerrero church. they took pictures on the front step, according to tiffany hartley. and they set down this channel to head back and it was able five minutes into their voyage when they were approached by the boats. in an instant, the man who told us this lake was safe was again speeding away from mexico 70 miles an hour. the same path the hartleys were on when tiffany says the attack began. there s a boat on our left and two on our right. on kind of towards the land,
to take pictures of old guerrero? why wasn t there far more blood evidence? the jet ski the jet ski was destroyed. my understanding, the jet ski was taken apart. that parts that would float were burn and buried afterwards and the parts that would the no float were thrown in the lake and, of course, they sunk. this is coming in from mexico. reporter: the sheriff believes hartley s story but may never be able to prove it. david hartley s mother can barely control her emotion. what happened to david and tiffany was an act of terror. plain and simple. it was a senseless violence, but it was an act of terror. and that is not going to end at the border. it s over here already. reporter: and for tiffany herself, it is even more troubling. reporter: do you think your husband is a victim of, in a way, politics? i would say a victim of
on her website, bring david home dot com there are plenty of people who still believe she is a suspect. she continues making statements perceived as odd. what she told me, that god was involved in this traffic stop the day david was killed. to help her. tiffany, you just said from that moment i knew god s hand was in our lives that day. people probably think that well, how? reporter: i m thinking that right now. because i believe he had us being pulled over to prove, because he knew that i would be judged, that i would be questioned that day for what happened. reporter: even though dna proved david s blood was on tiffany s life jacket, questions persist. where was the camera they used
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 that, based on past record, i think they have somewhat of a zero solvency rate and 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? [ female announcer ] thanks for financing my first car. thanks for giving me your smile.