Beatriz was the housekeeper working at the home of Alan and Julia Milliken during Day 3. She was responsible for arming the security camera system at the Milliken estate.
Beatriz found the body of Alan Milliken in his kitchen; he had died from a heart attack. She yelled for Julia, and the police were notified. Beatriz had no reason to suspect that Julia had been present when Alan died.
She was later questioned by Detective Norris. She informed him that a light colored car, possibly a Mercedes, originally woke her up. As she walked about to investigate the car, only then did Beatriz find Alan dead. The report given by Beatriz foiled Julia's attempt to cover up the fact that she and Sherry Palmer prevented Alan from getting his pills, and that Julia had turned off the cameras.