CATONSVILLE, Md. (WJZ) — A hit-and-run mystery. A mother is killed, found dead along the side of the Baltimore Beltway early Thursday morning.

Now police are trying to track down the car that hit her.

Meghan McCorkell has more on this heartbreaking story.

Police believe Judith Hill pulled over on the shoulder of the Beltway. When she got out of her truck, she was hit by another car that just kept going.

It was a horrifying sight for drivers along I-695, a woman’s body laying lifeless near the center median.

“It’s so instant. It’s like you didn’t get to say anything,” said Isaac Hill.

He says his mother, 62-year-old Judith Hill, was struck by a car around 5 a.m. after she got out of her truck on 695.

Her body may have been in the road for up to two hours before someone called 911.

“To know that you hit someone and kept driving, to not even call the cops or an ambulance. I mean, what if she was still alive? It just breaks my heart that somebody would do that,” said Hill.

Hill’s son says his mother was in an accident in the same stretch of 695 near Edmondson on Sunday. He thinks she came back to take pictures of the scene.

The Inner Loop was closed for hours as investigators searched for clues.

“Traffic was crazy, it was way backed up,” said driver Michael Palad.

“There was an aqua colored truck, looked like it hit the guardrail,” said Jeanette Poletynski.

That was Hill’s truck.

Police have no information on the car that may have hit her.

“We’re not sure if that person knows they hit someone or just thought they hit something else in the roadway,” said Sgt. Marc Black, Maryland State Police.

Isaac Hill is just looking for answers about what happened to his mom so he and his family can have closure.

“She still had a lot of life left in her. It was just very heartbreaking,” he said.

Hill’s family said she served the community as a nurse for 20 years.

Anyone who was driving in that area and may have seen anything is asked to contact the Golden Ring barracks of the Maryland State Police.