He is now the youngest living Medal of Honor recipient.
Police say on December 8th around 8:30 p.m., Carpenter hit a man was was trying to cross the intersection of Assembly and Blossom Streets at a crosswalk.
The victim then went inside the Strom Thurmond fitness center to call police and EMS.
Afterwards, Carpenter pulled to the side of the road and put on the vehicle's hazard lights, but stayed in the auto. That's when CPD says Carpenter drove away from the scene.
In June 2014, President Barack Obama awarded Carpenter the Medal of Honor for his heroic acts while serving in Afghanistan.
There was no evidence that either Carpenter or the victim were under the influence of alcohol or drugs at the time of the incident, officials say. According to military reports and other Marines who were on the patrol, Carpenter fell forward on a nearby grenade, shielding several others from the explosion.
He was booked at the Alvin S. Glenn Detention Center and released on bond.