Transcript for Families speak out about alleged dangers at Mexico resorts

We'll begin this half hour with those allegations from Wisconsin family who believed their daughter died after drinking tainted alcohol at a resort in Mexico and hearing of another American couple who suspect they were drugged or served tainted alcohol at a different Mexican resort and gio Benitez has a closer look. Good morning. Reporter: Good morning. It was the family vacation that turned into a family tragedy. After just two hours in playa del Carmen, abbey conner and her 23-year-old brother Austin ended up unconscious face down in the resort pool. Abbey dies just days later. More families are speaking out about their Mexican vacation stories. It was. Berostar resort in playa del Carmen where abbey was floating in a pool and her brother got a concussion. Their family questioning if tainted alcohol at the resort could have contributed to the tragedy and now other American families are coming forward. I thought I was dying. Reporter: This couple stayed at another resort in 2015 and saying they both blacked out after a few drinks from the beach bar. I thought I was dying because I couldn't get out of whatever state of mind I was in. I couldn't wake up and thinking how are my six kids going to find out and what's going to happen to them. Reporter: They said the hotel ignored their complaints. They thought they were drunk. They said that's never happened here. Reporter: Responding to abbey conner's death, iberostar said we only purchase sealed bottles that satisfy standards required by the authorities. We are deeply saddened and reiterate our condolences to the family. I believe the resorts are trying to hide the fact that the dangers exist. Reporter: Maureen Webster created the website Mexican vacation awareness about the potential danger after her 22-year-old son Nolan's unconscious body was pulled from a waist deep pool and he later died. The nurse tried to help but the hotel doctor pulled him away saying he was just drunk which Webster denies. All the cases that I've received on my website, the resorts are quick to blame the guests. I promise I'm not stopping until something changes. Reporter: Webster says she starred it around the same time TripAdvisor, a travel site used by nearly 400 million visitors each month refused to publish her reviews saying it did not meet requirements. TripAdvisor telling ABC news our guidelines state every review must be based on a firsthand experience and relevant to other travelers. It's important that anyone who suspects foul play or illegal activity contact the local authorities. The valeris say no review would convince them to return to Mexico. There are physical and emotional consequences that will never be able to leave us. Reporter: The state department's latest travel notice on travel to Mexico makes no mention of concern for vacationers at all inclusive resorts. The family of abbey conner told us overnight many have reached out to them with their own stories and their greatest hope is together they will finally get answers and help keep this from happening again. We should hope so. Thanks very much. Let's talk to Dan Abrams. He is back with our consultant Brad Garrett. Brad. What do you make of these allegations and how would you investigate? The allegations are pretty strong. Looking at a possibility of maybe grain alcohol or methanol mixed in with regular alcohol. And there's a lot of different motives as to why I think this was done. The short answer you'll have to investigate it, you the family. You cannot rely on the Mexican authorities. Pay private investigate sflers pay private investigators. The reality is this is a very sensitive investigation to do. You'll have to get into the nuts and bolts of the resort. You'll have to deal with the bartenders, the people at the pool and it's going to have to be people, George, that have a relationship, probably Mexican have grown up there, maybe ex-cop, but that's -- The FBI has no jurisdiction in Mexico. No, in in reality they don't. Whatever jurisdiction they have, the Mexicans give them and this is not the kind of case that they would step into. What kind of liability could this face? Let's separate criminal from civil. Criminal is what Brad is talking about, the investigation into wrongdoing. Civil would be the family suing. The problem in these kinds of cases is that if a business like this, this business happens to be Spanish based but doesn't have major U.S. Assets, you're typically saying you'll sue a company that is based in Mexico under Mexican civil law. That's stuff. It's tough both because you don't have the American protections and the personal injury law in Mexico is not favorable to a plaintiff like this in a lot of ways, so the bottom line is that if you're thinking about the potential risks and you're thinking about the legal side of this you got to think more about u.s.-based resorts. They have to have an asset in the United States that if there is a civil judgment, if there is an award that someone could say let's attach it and figure out a way to make them play. Dan Abrams and Brad Garrett, thanks very much.

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