U.S. Park Police are asking for help identifying a man whose remains were found under the Theodore Roosevelt Bridge in 2003.

Investigators believe the man, who was likely homeless, died in the summer of 2002. The medical examiner was unable to determine the cause of death.

A forensic anthropologist determined the remains are of a 30 to 39-year-old black male, who was between five feet seven inches and five feet eight inches tall. The anthropologist also noticed an an unusual bony growth on the upper left side of the man's mouth, which would have given him the appearance of a swollen cheek or face.

He also likely would have had difficulty speaking or eating.

Investigators released a sketch of what the man may have looked like. Anyone with information is asked to call U.S. Park Police Det. Kevin Fornshill at (202) 610-8751.