A short time later, the front door was found open and the child has not been seen since.
Police say the child's stepfather was watching him today, and the boy's mother speculated that he tried to walk to a neighbor's house, but never arrived. An Amber Alert was not issued because there was no sign of forced entry.
Police obtained a search warrant and searched the child's house. It is unclear why a search warrant was needed, but a police source tells Eyewitness News that the boy's parents are cooperating with the investigation. The mother says the stepfather loves Mark and doesn't know what could have happened.
"I just want him home," the child's mother, Christina Bookal, said. "I just want him home and alright. So wherever he's at, just let him come home, please. He didn't do anything to you. He didn't do nothing. He didn't ask for this. Just let him come home."
Mark was last seen wearing a red, long-sleeve shirt, white Nike Uptown sneakers and gray Rokaware sweatpants. He is light skinned, wears his hair in a medium length afro and has discolorations on the back of each hand from a previous burn injury.
Anyone with information is asked to call 1-800-FIND-KID.