The docuseries points the needle towards this theory while also looking into the suspicious evidence and strange coincidences surrounding the case. Lam's body was moderately decomposed when hotel worker Santiago Lopez discovered her body in the water tank. However, the medical examiner was able to gather some information during her autopsy. Lam's body was naked, which led to suspicions of assault. However, the autopsy revealed no trauma signs on her body, which would have been very likely if someone carried her up the fire escape ladder and put her inside the water tank. She might have taken her clothes off in an attempt to float up or because of a physical reaction from her body.
Officials discovered a critical finding in the toxicology report: Lam appeared to have been undertaking her bipolar medication. Experts believe that Lam likely stopped taking her medication, which could account for her mannerisms in the lift video. Before Lam went missing, she also exhibited odd behaviour during a TV show taping and with her hostel roommates.
So how did Lam get to the water tank? While the emergency exit to the rooftop would trigger an alarm, Lam could have taken the fire escape ladder and climbed to the water tank. According to the former hotel manager, the tank was not locked.