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.…