One was 16; the other was 5.

Both had their entire lives in front of them. Both were snuffed out in an instant.

Both were victims of hit-run drivers. They met death at the hands of a car, and a driver who did not stop after so brutally extinguishing their lives.

But there is a key difference in the circumstances surrounding the cases of little Tyrell Elliott, who was struck and killed in the Logan section of Philadelphia early Sunday, and Faith Sinclair, who was hit three weeks ago as she tried to cross Chester Pike in Sharon Hill.

After initially fleeing the scene, a suspect in the hit-run death of 5-year-old Elliott has come forward to turn himself in. There’s been no such development in the Sinclair tragedy.

Police have impounded a car they believe is the Mercedes that slammed into her. They know who the owner of the car is, but no charges have been filed in the case.

We still do not know who was driving.

It’s now been three weeks and one day.

We have not forgotten.