When a renowned hairstylist is killed poolside, investigators look at his wife. Was her alleged affair with her racquetball coach a motive for murder? “48 Hours” contributor Michelle Miller reports. | CASE UPDATE: On April 11, 2025, a jury found Monica Sementilli, the wife of famed hairdresser Fabio Sementilli, guilty of murder for his 2017 death in which he was beaten and stabbed in their Los Angeles home.