Marcus was abducted by his non-custodial father, Sergio Salerno Farina (photos and information below). A felony warrant for kidnapping was issued for Sergio on December 12, 1991 and an FBI warrant for unlawful flight to avoid prosecution was issued for him on October 27, 1993. They may be in South America, possibly in Brazil, or may have traveled to Aquila, Abruzzi, Italy.
Investigating Agencies:
Los Angeles Police Department: 1-213-485-2603
National Center for Missing & Exploited Children: 1-800-843-5678