Maria Cruz, a successful, 35-year-old New York City financial analyst, disappeared on the afternoon of April 13, 2003. For 10 months, police were unable to find Cruz, but the trail of evidence finally pointed to a man named Dean Faiello, who posed as a doctor and is believed to have treated Cruz for a mouth infection the day she went missing. In February 2004, acting on a tip from Faiello's former lover, Greg Bach, authorities found Cruz's body stuffed in a suitcase and buried in the cement in the garage of Faiello's former home in Newark, N. J. Just one month later -- 11 months after Maria Cruz was reported missing -- Dean Faiello was under arrest for Cruz's murder in Costa Rica.

48 HOURS MYSTERY has new clues in Los Angeles' most famous unsolved murder, the 57-year-old Black Dahlia case. The brutal murder of Elizabeth Short, a young, beautiful, struggling actress whose body was discovered in a vacant lot in January 1947, has baffled the Los Angeles Police Department for decades.