Page 25 - Inside Mexico News Today : Breaking News, Live Updates & Top Stories | Vimarsana

>> reporter: so based on your sources and your intelligence, when they began to encroach on what would be a drug deal, they were looked upon as potentially -- >> as threats. yes. as threats. and that's why they were given instructions to go ahead and shoot at them. >> reporter: the sheriff now tells cnn that eyewitnesses have come forward to him. witnesses he says who claim to know what happened here that day. they describe a military-style attack. three boats, several shooters, and hundreds of rounds being fired at two jet skiers. >> the shot that killed david hartley was an unlucky shot. >> ...

Where was the camera they used 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 si...

Reynosa, jut south of mcallen. he was a district manager for an oil company. >> it was a blessing to us and our marriage. yeah. we were -- that's where we truly grew as a couple and had adventures. >> reporter: when the hartleys first arrived here this peaceful town was a perfect place for the young couple to live, but slowly it became more and more violent. there is a war in reynosa. two drug cartels battling for turf. the zetas, a rogue band of former military, are trying to push out the gulf cartel which has smuggled drugs across the rio grande for decades. killings are constant. tiffany an...

♪ ♪ >> reporter: on falcon lake there has been no sign of david hartley's body, his jet ski, anything that could prove his wife's story, that her husband was shot to death by mexican drug smugglers. the beheading of the one mexican detective, willing to at least try to solve the crime, has dealt the hartleys another blow. you feel right now there's people in mexico, maybe even police in mexico, who won't say what happened to david. >> yes. >> reporter: because they're afraid. >> yes. if you have threats against your loved ones, if you don't know if they're going to come home, i mean, that'...

For it to be a conspiracy she'd be paying people off. >> reporter: the sheriff believes tiffany's story and his sources 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 ...