Published: Apr 22, 2010 10:16 PM EDT

 NEW YORK , NY - Police say a couple who ditched a toddler at St. Patrick's Cathedral in New York days after he went missing in Florida has skipped town and headed north.

Eleanor Black was seen on surveillance footage at the famed Fifth Avenue landmark moments before 3-year-old Nathaniel Fons turned up alone at the cathedral with a note stuffed in his hand bearing the name of a Florida detective working the case.

She and 32-year-old William Scott are believed to have been the last two people with the child. They're also suspected of being involved in a counterfeiting operation in Florida where the boy's mother has been charged.

Police Commissioner Raymond Kelly says the couple is believed to be heading north. They face charges in New York of endangering the welfare of a child.

Related: Police ID couple who ditched missing boy