Buenos Aires police officers told TMZ their operating theory is that the former One Direction star was potentially high on an illegal drug known in Argentina as cristal a dangerous substance that "causes users to experience extreme highs and extreme lows, often making them aggressive". The substance is also known to cause psychotic attacks and hallucinations. Police told the outlet that Payne's reportedly erratic behaviour may be partly due to the drug, and may have caused him to hallucinate, leading him to fall from the third-storey balcony of his hotel room at CasaSur Palermo Hotel in Buenos Aires.