OSHKOSH, WI (WTAQ) - Police in Oshkosh need your help in finding a missing and possibly endangered woman.

Adelaida M. Rivera was last seen Sunday May 29 in Oshkosh and left behind an infant in the Theda Clark Medical Center ICU.

The 18-year-old Rivera may be in the company of 26-year-old Leonel Bustillos. Bustillos also is known by Estrada, Hersaim B. Bustillos and Leonel E. Aguilera. He has made threats in the past to harm Adelaida and kidnap the child.

Adelaida is described as 5'6", 145 pounds, with brown eyes and black hair. Leonel is described as 5'6", 140 pounds, with brown eyes and black hair. They may be in a 2002 white Ford Explorer with Wisconsin license plate number 791-PYK or a 1994 green Cadillac El Dorado, with Wisconsin license plate number 733-RZX.

Anyone with information on the whereabouts of these two are highly encouraged to contact Detective Paul Frey at the Oshkosh Police Department at (920) 236-5267, or can remain anonymous by contacting Winnebago County Wide Crime Stoppers at (920) 231-8477.

You can also text an anonymous tip to "IGOTYA" plus your tip to 274637 or go to www.winnebagocrimestoppers.org and send your tip online.