Marco was last seen leaving his family's residence in a trailer park in northwest Miami, Florida on May 11, 1994. His mother told authorities that he left their home after they had an argument and she threatened to punish him. She told him to take a shower, and instead he walked out the door. He has never been heard from again. Marco was upset at the time of his disappearance because his mother had hit his stepfather. He left a note behind saying he was leaving because of that incident. Marco has an appendectomy scar on his abdomen and a scar on his left ankle.