Donny Jackson was one of four teens involved in the crash, but police didn't find his body until hours later.

The Pierce County medical examiners office told KOMO 4 News we'll never know if Donny had been found sooner, whether he could have been saved. But that's not the only unanswered question for Donny's family.

"I want to know the truth. The truth might hurt, but at least I would know," said Doris Jackson.

Doris is dealing with the unthinkable - she outlived her son.

Donny, 15, died Saturday in a horrible head-on collision. No one knew Donny was even in the car until nearly four and a half hours after the crash. His body was found hidden under the car and in some brush.

"The anger came back, my upper body just fell in the coffin," described Doris. "I was crying and holding him and kissing him and saying 'why did this happen to my baby?' "

The accident happened Saturday night on the Key Peninsula, southwest of Gig Harbor. Police say a carload of four teens sped through a stop sign and rammed another vehicle.

Medics only found three teens at the scene, police say that's because the driver insisted there was no one else in the car.

"All that young man had to do is say where Donny was. It makes me wonder what kind of person he is and why he wouldn't tell? Just how black is his heart?" wondered Doris Jackson.

Pierce County Sheriff's Detectives think the driver lied, but they don't know why. He's now being investigated for vehicular homicide, negligent homicide and obstruction of justice.

We've even learned from detectives that the driver, Daniel Perez, 18, has no driver's license and has no business being behind the wheel of a car.

"If we'd had accurate information at he scene, the outcome may have been different. But at this point, that's just speculation," said Laura Pawlawski, a spokesperson for the Pierce County Sheriff's Office.

"We shared a room and he sat behind me," said Donny's older brother Paul. "We were both really into computers and it's hard to turn around and not see him playing on his computer. It really sucks not to have him around."

It's not just Donny's mom or his brother Paul, but his twin sisters and friends who also need answers.

"How long did he survive before God took him?" asked his mother. That's a question that will haunt her forever and especially on Thursday when Donny is laid to rest.

The Sheriff's Office said it will likely recommend charges, but it will be up to the Pierce County Prosecutor to decide whether to charge the driver.