She was at the perfect age for waving glow sticks in darkening air and delighting in their yellow and pink swirls. A play date was coming to an end for the 6-year-old. Her mom and sister were standing there with her, on the driveway at her friend's Shaler Township home, about an hour north of Pittsburgh.
The sounds of play were broken off by the roar of an engine and squealing tires. A car hurtling at more than twice the speed limit veered off the residential street, plowed over a mailbox and barreled through the yard. A neighbor said she heard a "terrible bang" and ran outside. On the ground she saw glow sticks scattered around the convulsing body of the little girl.