In a tale of love, betrayal and murder, “48 Hours” reports on the fatal stabbing of famed hairstylist Fabio Sementilli and accusations of a complex plot involving the victim’s wife and her alleged lover. | CASE UPDATE: On April 11, 2025, a jury found Monica Sementill, 53, guilty of murder and conspiracy for masterminding the murder of her husband Fabio, with special circumstances of murder for financial gain and murder while lying in wait.