US Immigration and Customs Enforcement (ICE) released images of a man suspected of sexually assaulting the girl, who is believed to be between seven and nine years old.
The agency believes the man is located somewhere in the US, and is hoping the photos will help lead to his arrest and the girl's rescue.
The unidentified male, believed to be between 45 and 55 years old, is balding and has a brown moustache.
ICE has encouraged anyone with information that could help identify the man to fill out an online tip form at www.ICE.gov/tips or call 1-866-347-2423 if in the US or Canada.
Callers anywhere else in the world can dial 802-872-6199.
The agency says tips will remain anonymous.