STONE MOUNTAIN, Ga. -- A 25-year-old man suffered serious injuries after his vehicle was rear-ended by a tractor-trailer on Highway 78 early Saturday morning.

Sherrell Watts said her brother, Vincent Brown,was driving home around 2 a.m. when his Acura was struck by the 18-wheeler.

A witness said that Brown's vehicle flipped several times after it was hit. The witness said she saw the tractor-trailer slow down after it hit the Acura, but then continued down the highway.

Brown was taken to Atlanta Medical Center and underwent surgery. His sister said he had to get three pins placed in his broken hand. She said he also sustained a broken arm, a concussion, a contusion and broke a blood vessel in his eye.

Watts said her brother doesn't remember much about the crash.

"He said, 'I was going straight and it was dark; I didn't see anybody,'" Watts said.

Watts said her brother is an audio-video technician and was a "quiet, hard-working guy." He was released from the hospital on Sunday and is recovering at his mother's home. The family's attorney, Tim Gardner, said that Brown had just started a new job and that his health insurance hadn't begun yet, so he's facing tens of thousands of dollars in medical bills if the driver can't be found.

Police are searching for any tractor-trailer that may have gotten gotten repairs since the accident.

Anyone who may have information on the hit-and-run is asked to contact the DeKalb County Police Department at (404) 371-2000.