Complex sentence: At the prom, Fenton arrives at the hotel disguised as a man named Howard K. Ramsey, and takes a room on Donna's floor and kills the housekeeper (Jacqueline Herrera) to get the master key.
Split into simpler sentences: At the prom, Fenton arrives at the hotel disguised as a man named Howard Ramsey. He reserves a room on Donna's floor and kills the housekeeper (Jacqueline Herrera) to get the master key.