A Sabattus man who police said was responsible for a fatal crash in Lewiston is now charged with manslaughter.

Investigators said 37-year-old Ryan Curran was speeding when he smashed his pickup truck into the back of a vehicle that was stopped on Wednesday. The vehicle’s rear was crushed, and the woman in the back seat, 60-year-old Shari Williams, was killed.

Curran was arrested and initially charged with violating probation. On Tuesday, authorities said he had also been charged with manslaughter, operating after suspension and probation hold.