♪ your ticket to a better night's sleep ♪ >> reporter: david hartley had always been interested in visitingnken church in falcon lake. on thursday morning, september 30th, 2010, a week before he and his wife would move home to colorado, david decided they would go. >> did you know now what you must have known then, there have been several issues on that lake? fishermen don't cross into mexico on that lake any more. >> we did know there were attack. we didn't know where exactly. >> reporter: you had no worries whatsoever when you took those jet skis out? >> no idea. >> as tragic as this is what i think i'm hearing from you is what the hartleys did was incredibly stupid. >> incredibly. >> reporter: fishing guide and resort owner speedy colette says business on the lake has taken a beating since the hartleys made what he called a stupid trip to see a sunken church. he is sick of the media attention and insists that the fish and the fisherman are completely safe as long as they follow the unwritten rules. >> this is not a jet ski lake. never a jet ski seen. here they come -- they show up on jet

lowest price, guaranteed. ♪ sleep train ♪ your ticket to a better night's sleep ♪ >> reporter: david hartley interested in visiting the sunken church in falcon lake. on thursday morning, september 30th, 2010, a week before he and his wife would move home to colorado, david decided they would go. >> did you know now what you must have known then, there have been several issues on that lake? fishermen don't cross into mexico on that lake any more. >> we did know there were attack. we didn't know where exactly. >> reporter: you had no worries whatsoever when you took those jet skis out? >> no idea. >> as tragic as this is what i think i'm hearing from you is what the hartleys did was incredibly stupid. >> incredibly. >> reporter: fishing guide and resort owner speedy colette says business on the lake has taken a beating since the hartleys made what he called a stupid trip to see a sunken church. he is sick of the media attention and insists that the fish and the fisherman are completely safe as long as they follow the unwritten rules. >> this is not a jet ski lake. never a jet ski seen. here th

>> reporter: clearly nervous, colette barely slowed down as we approach the church tiffany and david hartleyited on september 230 30th. he turned the boat and gave us 30 seconds to take the pictures at the exact spot tiffany hartley said he stopped. >> this is the last place they came to at the old guerrero church. they too many pictures on the steps and then set out down this clan to head back and it was about 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, 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. up 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 boat

no discomfort. >> reporter: david hartley had always been interested in visiting the sunken church inhursday morning, september 30th, 2010, a week before he and his wife would move home to colorado, david decided they would go. >> did you know now what you must have known then, there have been several issues on that lake? fishermen don't cross into mexico on that lake any more. >> we did know there were attack. we didn't know where exactly. >> reporter: you had no worries whatsoever when you took those jet skis out? >> no idea. >> as tragic as this is what i think i'm hearing from you is what the hartleys did was incredibly stupid. >> incredibly. >> reporter: fishing guide and resort owner speedy colette says business on the lake has taken a beating since the hartleys made what he called a stupid trip to see a sunken church. he is sick of the media attention and insists that the fish and the fisherman are completely safe as long as they follow the unwritten rules. >> this is not a jet ski lake. never a jet ski seen. here they come -- they show up on jet skis that they don't see -- the

>> reporter: clearly nervous, colette barely slowed down as we approach the church tiffany and david hartleyed 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, 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

the wild west, two young americans, david hartley and tiffany young, just teenagers when they fell in love. >> we started dating in '98. the summer of '98, and dated for quite a while before we got engaged in 2001 and married in 2002. >> what took so long? >> we were 18. >> reporter: they wound up here, in the mexican border town of 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 hartley's first arrive 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