threat has emerged. pirates. totally inaccurate. definition of piracy a lot different than when i know it to be. had one robbery on the lake totally. reporter: robert s speedy colette ho owns a fishing business admits he s been stopped by cartel but bristles as news reports of piracy and danger. these reports decimated his boins the lake which he insistence is safe. as long as you know the rules. it happened to me. i didn t run. they boarded. they found out i wasn t a threat, and i was released. never robbed. never took a penny from me. they did not my wallet was in my glove box. i had $1,100 in my wallet mip clients were wealthy people. plenty of money on them. nothing ever happened to them. reporter: in the air over falcon lake, stacy holland says
fired at two jet skiers. the shoot it killed david hartley was an unlucky shot. reporter: the sheriff now believes the killers were instructed to kill tiffany hartley, too. what happens next, he says, is a scenario he has put together from three witnesses on the mexican side of the lake. one source in mexico and at least one witness who told cnn that he saw a high speed chase on the u.s. side. a boat chasing a girl on a jet ski. it is clear that one of sheriff gonzalez sources was involved in the attack itself. so given instructions to shoot to kill her also, but she was able to escape. she said she was able to get away from us and we kept shooting at her to this her but she kept zigzagging and we were not able to hit her. she says she was zigzagging being chased by the boat into the united states, and the, of course, there s a witness that corroborates that, also.
incredibly. reporter: fishing guide and resort owner speedy colette says boins the lake has taken a beating since the hartleys made what he called a stupid trip to see a sunken church. he insistence the lake and fishermen 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 then try it approach them and stop them, because it s a war over there. two cartels fighting each other for control shts. and they don t stop. they take off running. colette agreed to take us eat miles into mexico into what he describe as drug war to show us just how safe it really was. but before he even passed the channel marker dividing the u.s. and mexican border, speedy made
. they were going to be home that next week looking for a house to move into. i mean, we were excited about them coming home. reporter: but there was some unfinished business. one last adventure david had long talked about, but never got around to. he had heard of a church partially submerged in falcon lake on the mexican side in an abandoned village called old guerrero. perfect for a couple who loved their jet skis and loved adventure. i m just like, okay. let s go see. reporter: had they asked local law enforcement would have warned them about pirates on the lake. had they asked, captain stacy holland would have told them not to go. we don t recommend going into mexico on the side of the lake, but it s perfectly well with yo rights but we just want to you