Wouldn't that be an attempted kidnapping vs a carjacking? Carjacking means taking the car from the person as far as I know, not taking the person and the car.The victim may have exited the vehicle while it was moving. Either pushed by the carjackers (multiple perps makes more logistical sense) or of the victim's own accord in an attempt to escape. If you are fairly certain you will become the victim of homicidal violence - it may feel like you have a better chance with a combat roll. Could get lucky if there's a big grassy median in close proximity. As sad a thought as this scenario is - I hope the investigators have done an EXTREMELY comprehensive search of the areas adjacent to 75S, 45 and 35S... maybe even 30W near the Trinity overpass. There's a lot of concrete culverts, interstate/overpass infrastructure and steep slopes along all the downtown corridors. He could actually be on top of something at an angle where he couldn't be seen from above or below from anyone traveling the speed limit.