John Prentice Hicks was charged in the April 12 assault of a woman on the D.C. metro system.

Authorities say they’ve filed charges against a man accused of assaulting and trying to rape a woman in April on a Metro train outside the nation’s capital.

Thirty-nine-year-old John Prentice Hicks of Washington, D.C., has been charged with attempted first-degree rape, first-degree sexual offense and second-degree assault in connection with the April 12 incident. He was extradited last week and ordered held without bond on May 23.

Metro Transit Police say the woman awoke and was attacked by the knife-wielding suspect before he got off the train. Police say Hicks was arrested hours after the attack in Montgomery County, a Maryland suburb of Washington.

Montgomery County State’s Attorney’s spokesman Ramon Korionoff says surveillance footage at a Metro station helped identify Hicks as the suspect.

Metro General Manager Paul J. Wiedefeld said May 24 that he has directed Metro Transit Police to make a public notification of any violent crime on the same day that the crime happens as long as “doing so will not hinder the investigation or the police department’s ability to apprehend a suspect,” a Metro spokeswoman told AP