A 20-year-old Wisconsin woman died under mysterious circumstances at a hotel in Mexico while vacationing with her family, and now her family is desperately searching for answers about the final moments of the young woman’s life.

According to the Journal Sentinel, Abbey Conner, 20, was found face-down and unresponsive just hours after arriving to the Iberostar Paraiso del Mar in January. Her brother Austin Conner was also found unconscious in the pool, but survived.

Though both siblings had been drinking before the tragedy, Austin has said he believes someone slipped a drug into their drinks that caused them to lose consciousness.

Abbey and Austin had just arrived with their parents to the all-inclusive resort in the early January evening when they headed to the pool for a swim, and had some drinks at the poolside bar. Their parents briefly joined them before heading back to their room to get ready for dinner. They planned to meet their children at 7 p.m.

When their children didn’t appear and couldn’t be reached on their cellphones, Mrs. Connor and her husband, the children’s stepfather, went to the hotel front desk and asked a hotel staffer to call the room. A hotel manager then informed the parents there had been an accident and the children had been taken to a hospital in an ambulance.

Austin had a severe concussion, but doctors said he would recover. Abbey was in a coma, with a cracked collarbone.

The young woman was transferred to a hospital in Florida, where doctors confirmed she was brain dead. Days later, her family agreed to take her off life support, and Abbey passed away.

Austin told the Journal Sentinel that he and Abbey would not have been drunk enough to lose consciousness in the pool. They both had a blood alcohol level of about 0.25, which is considered severely impaired.

Abbey’s brother told the newspaper that the last thing he remembers is joining a group of young men for a shot, and that he wasn’t sure what was in it. He says he blacked out and the next thing he remembers is waking up in an ambulance.

“I’ve been in college for five years and had my fair share of drinks before,” Austin told the newspaper. “No way in hell I’m putting my face down in a pool and going to sleep.”

“Somebody had to slip them some type of drug,” said their father Bill Conner, who was not with them on the the trip.

The family hired an attorney to review the investigation into Abbey’s death. The attorney found that police in Mexico had spoken to only three staff members at the hotel. They reportedly did not speak to any bartenders or hotel guests. The resort did not have any security cameras by the pool.

“I still can’t believe this happened,” Bill Conner told the newspaper. “I’m still waiting for my daughter to walk through the door. This couldn’t have happened … in the middle of the bar, two adults, floating in the pool long enough to drown.”

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