A Texas father fatally shot a would-be carjacker who tried stealing his car — with his family, including his young children, still inside — after the suspect fled the scene of a multi-vehicle crash across the street.

The chaos began Sunday afternoon when a driver slammed into two cars along Highway 66, about 18 miles outside Downtown Dallas, at around 3:30 p.m., according to the Garland Police Department .

The driver, whose name has not been released by police, then fled to a nearby gas station, where he was accused of trying to “take several vehicles by force.”

A Texas dad shot and killed a would-be carjacker who tried stealing his car with his family, including his young children, still inside.

Surveillance footage obtained by Fox 4 showed the suspect approach the victim’s white Impala in the parking lot of a shopping center across the street.

The erratic suspect, whose name has not been released by police, walked up to the driver’s side of the Impala and immediately prompted the father to jump out of…