Isabella Guzman was told by police hours before the murder that she had to respect her mother or she would be thrown out of the house.
An 18-year-old from Aurora, Colo., sent her mother an email that said, “You will pay” the day before she stabbed the woman 79 times, an arrest affidavit filed Friday revealed.
Isabella Guzman and her mom, 47-year-old Yun-Mi Hoy, often fought, but her stepfather, Ryan Hoy, told authorities that the teen had recently become more “threatening and disrespectful.” His worried wife showed him an email from Isabella on Wednesday morning that said, “You will pay,” and she later called the police saying that her daughter “had threatened to harm her,” Denver’s 7NEWS reported.
Ryan Hoy told police he heard a thumping sounds coming from upstairs while he was eating dinner on Wednesday night. He also heard his wife, who was taking a shower, calling his name, so he rushed upstairs and tried to push his way into the bathroom. He could still hear the shower running, and saw Isabella before the teenager shut and locked the door.