A married Nevada couple was mysteriously found dead in their Mexican hotel room

Their son, Deven Simms, has since been combing and translating police records trying to figure out what happened.

He said Mexican authorities believe their parents' deaths were caused by drugs, but there are discrepancies in 'every document' about how many drugs were found and of what kind.

But because the Mexican police ruled their deaths were not suspicious, the family does not have the option to run independent autopsies in the United States.

'I know now we will never know,' Deven told the Gazette Journal, noting that his father did not drink - so it was impossible to believe his parents could overdose on drugs.

'They were there with work friends too,' he said. 'They weren't going to go and do that.'