WASHINGTON — The Federal Bureau of Investigation is seeking the public’s help in its effort to identify an unknown male suspected of sexually exploiting a child.

Photographs and informational posters depicting the unknown individual, known only as John Doe 28, are being disseminated to the public and can be found online at the FBI website at www.fbi.gov/wanted/ecap.

Initial images and video of the unidentified adult male, John Doe 28, engaging in sexually explicit activities with a child were first recorded by the National Center for Missing and Exploited Children in November of 2012.

Investigators for the FBI and the National Center for Missing and Exploited Children have successfully enhanced images depicting John Doe 28 and believe they contain several clues, which may assist with identifying the man.

The video shows the suspect and the victim inside a residence with what appears to be a blue sofa chair and a picture hanging on a wall in the background, the FBI said in a news release Wednesday. Additionally, the suspect is seen wearing wire-framed glasses and a burgundy T-shirt with what appears to be a shark logo on his left side.

The suspect appears to be a white male, possibly in his 30s or 40s, with a receding hairline.

There are no specific details linking the suspect to a particular state or region of the United States, and his identity and whereabouts are currently unknown.

This man is being sought as part of the FBI’s Operation Rescue Me and Endangered Child Alert Program initiatives, both of which represent strategic partnerships between the FBI and the National Center for Missing and Exploited Children.

Operation Rescue Me focuses on using clues obtained through in-depth image analysis to identify the victims depicted in child exploitation material, while the alert program seeks national and international media exposure of unknown adults (referred to as John/Jane Doe) whose faces or other distinguishing features are seen in child pornography images.

Anyone with information to provide should submit a tip online at https://tips.fbi.gov/ or call the FBI’s toll-free tip line at 1-800-CALL-FBI (1-800-225-5324).