Flowers, candles, a teddy bear and a picture of the driver — whose identify is being withheld — were attached to a tree at the corner of Stillwater Avenue and Progress Drive. Sgt. Andrew Gallagher, the head of the police department’s Collision and Analysis and Reconstruction Squad, said the youth was traveling too fast on Stillwater Avenue when his car veered out of its lane into the long turn and into the eastbound lane before striking the tree.