Editors' note: Earlier stories on this incident reported that Arrington got into a verbal altercation with a man, and he ran her down. Now, sources tell ABC7 that the confrontation was with another woman.

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As Fairfax County Police continue to investigate the death of Alexandria resident Shelinda Arrington, her family, neighbors, and Hybla Valley residents are left with many questions.

Among them... what really did happen on Harrison Lane Friday morning? Was there a violent encounter between two drivers, that left Arrington, just 21 years old, fatally injured?

"I think it was road rage" says Lisa Proffitt, a neighbor, who says she knew Arrington casually.

Proffitt says she walked outside from her Harrison Lane apartment, and saw what appeared to be a car accident scene cordoned off.

She says two people told her Arrington had gotten into an argument with another female driver.

"They was arguing back and forth", Proffit says she was told. "She jumped out to say something to the car and the girl was going to pull off and she jumped on the hood of the car."

Sources say police believe Arrington was somehow thrown off the hood; that the other vehicle ran her over, then drove away.

Arrington died at the hospital, from a fatal skull injury.

"She didn't deserve to die like that", says Arrington's mother, Tanya Moore.

Moore, who spoke with ABC7 late Saturday, is now grieving the loss of her only child.

She says her daughter, known by family members as 'Lee Lee' was on the way to visit her in the hospital, after she suffered a stroke.

Then, the unthinkable happened.

"I take one day at a time", Moore says. "I need to rest, get myself together, so I can address what's going on."

Police say they don't know what sparked off the argument, or even if the two drivers knew each other.

But the notion that a road rage incident could end like this has many residents along Harrison Lane concerned.

Patty Wells, who lives just down the block from where the incident occurred, wonders what the driver of the missing vehicle was thinking.

"Hard to believe that someone would get that angry over something", she says. "I think people lose their tempers far too fast."

But Lisa Proffitt says she finds the story hard to believe--- that Arrington, studying criminal justice at school, hoping for a career in law enforcement, would lose her temper in a situation like this.

"She's a very nice girl", Proffitt recalls. "That would be out of character for her. I don't see her being that type of person."

Police are looking for a dark-colored SUV, possibly a Chevrolet, with temporary tags. Authorities have posted electronic billboards, in hopes of finding new witnesses, and are asking any members of the public with information, to come forward.