BOSTON (AP) — A former Uber driver accused of sexually assaulting a woman last year he picked up last year has been charged in two unsolved Boston rape cases going back almost a decade.

Suffolk District Attorney Daniel Conley said Tuesday that 46-year-old Alejandro Done has been linked by DNA evidence to five sexual assaults in Boston between 2006 and in 2010.

READ MORE: Holiday Market Open 24/7 In Hanover Operates On Honor System

https://twitter.com/BerniceWBZ/status/621025791581630464/photo/1

“These were vicious, violent attacks on unsuspecting women” said Conley.

A spokesman for Conley said Done has been charged with rape in attacks in July 2006 in South Boston and July 2007 on the Esplanade parkway along the Charles River, and charges are being prepared in the three other cases.

READ MORE: Strong Wind Figures To Be Major Factor For Patriots-Bills Monday Night Matchup

The women were always alone, and walking during the night.

“When you have victims who are so viciously assaulted like this, it’s good for the victims to know we never give up,” said Boston Police Commissioner William Evans.

Done pleaded not guilty in Cambridge in December to kidnapping and raping a woman he picked up after she summoned an Uber driver. He is held pending trial. In the meantime, he is expected to be arraigned this week for the new charges.

MORE NEWS: Jamie Collins Activated From IR Ahead Of Patriots-Bills

Copyright 2015 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.