LEWISTON – A teenager injured in a car crash that killed an Augusta man Tuesday night in Sabattus was improving Friday night at Central Maine Medical Center.

Damion Fincher, 18, of Gardiner, was in serious condition after days of being listed as critical, according to a nursing supervisor.

Fincher and three others were injured in the Lisbon Road crash that claimed the life of 19-year-old Christopher Clark, of Augusta.

The other passengers hurt in the wreck were treated for their injuries and later released.

Police said Clark was driving the car when it crashed early Tuesday night. Speed and erratic driving were said to be possible causes of the wreck, though the crash remains under investigation.