Elisa Lam
Elisa Lam was a Canadian exchange student staying alone in a downtown Los Angeles hotel. Lam was supposedly acting erratically before she disappeared; surveillance footage showed Lam in the elevator right before she died. She can be seen entering and exiting the elevator several times, speaking and gesturing toward the hallway outside, and sometimes hiding in the elevator, which appeared to be malfunctioning. There was nobody else in the hallway.