How she got into the cistern remains a mystery.[30] The floor Lam stayed on was one of the floors that did not have security footage, which left uncertainty as to whether her death was a homicide, until Lam’s sister had revealed to detectives that Lam had a history of not taking her medication. Among her possessions left at the hotel were several prescription medications, seemingly untouched. Lam had previously been diagnosed with an extreme form of Bipolar Disorder.