Two doctors and two paramedics were convicted for the murder of five patients, but the investigation is continuing, with over 40 remaining suspects.[369] Loren Herzog and Wesley Shermantine United States 1984 to 1999 4 19+ Known as the "Speed Freak Killers"; California duo initially convicted of four murders from 1984 to 1999.[370] Raymond Fernandez and Martha Beck United States 1947 to 1949 3 20 Known as the "Lonely Hearts Killers", Fernandez and Beck extorted women Fernandez met through lonely hearts advertisements. Both were arrested in Michigan in 1949 for the murders of a woman and her two-year-old daughter, but Michigan authorities waived prosecution and extradited the pair to New York to face trial for a murder that occurred there because New York had the death penalty while Michigan did not. They were convicted of that murder and executed in 1951.[371] Beasts of Satan Italy 1998 to 2004 3 18 Cult members responsible for ritualistic murders, and are suspected in other cases, including suicides.[372]