2012 International Prostar Engine Derate

My engine derated out of the blue and had shut off engine message on and did not say need to regen or anything. We drove the truck for about 50 or so miles and it eventually dropped to 5 mph then it started to shut off and we would crank it up and go a little further because we were in the middle of nowhere and were trying to get back into the closest town. Eventually it started to blow white smoke from the exhaust off and on and you could smell diesel really bad and one time it sounded like it backfired. Eventually it would not go into drive after cranking so I could move it off the road and the police chief hooked a chain to me and pulled me off the road. Does this mean that it's the DPF and could I have damaged the engine by driving it? This truck just has the DPF, no DEF. Thanks in advance for your replies.

 

Yes it was the red light. I'm having it towed to a shop today...hopefully it's good news.