An unnamed Marine Sergeant from Camp Pendleton was filmed unleashing a torrent of threats and obscenities in the direction of a driver who allegedly rear-ended his car.
The two say the marine's violent temper has traumatized them, and they asked to remain anonymous.
A friend who spoke on their behalf said the accident occurred after the verbally abusive marine stopped short several times.
Sources with knowledge say the Marine's car sustained "minor scratches" while the truck belonging to the paralyzed Marine and her brother "needs a new bumper and grill."
"This individual's behavior does not meet the standards that are expected of our Marines and it has received the attention of senior base staff," a base spokesman said in a statement.
It is unclear if criminal charges will be filed. A Purple Heart recipient, the Marine is said to be suffering from PTSD and may be exhibiting signs of intermittent explosive disorder, according to one psychologist.