A 52-year-old D.C.-area man was charged in an alleged 2004 indecent assault on a then-23-year-old woman on a Boston subway.
Timothy Day, of Bethesda, Md., pleaded not guilty to indecent assault and battery Monday in Suffolk Superior Court. Bail was set at $1,500.
DNA evidence linked him to the case, authorities said.
The woman reported to police she found bodily fluids on her purse and slacks after a man pressed against her from behind on a train, Boston prosecutors said.
The DNA from Boston matched a similar 2002 case on the Metro transit system in Virginia, prosecutors said.
The DNA link to Day was discovered last year. He was arrested May 15.
The Boston Globe reported Virginia authorities say the time limit to prosecute their case has expired.