Najarred Theodore Walker. (Courtesy Frederick Police Department)

Najarred Theodore Walker, 27, of no fixed address, turned himself into police in Hagerstown Monday for an unrelated probation violation and was then charged with four counts related to the more than 6-year-old sexual assault, acccording to Frederick police.

Frederick police were able to tie Walker to the rape after he was convicted of an offense in Tennessee and submitted a DNA sample to a national database.

Maryland State Police forensic experts notified Frederick authorities that the sample matched DNA collected from the scene of the sexual assault, according to police.

The rape occurred in November 2004. The woman reported a man approached her from behind near Carroll Creek Linear Park. The suspect grabbed the victim, told her not to scream and then raped her, according to police.

The victim was able to provide authorities with a detailed description of the suspect. Police determined Walker was living in Frederick at the time of the rape and issued a warrant for his arrest near the end of March. Walker faces four charges: first-degree rape, second-degree rape, second-degree assault and a third-degree sex offense.