Please Help! 2000 Mustang Convertible V6 Theft System Issue, Car Shut off, Now no, Start, Theft Light Flashing quickly!

I have a 2000 Mustang Convertible V6, with 73k miles, I was driving the car and was coming to a stop sign, all of the sudden the car lost power, lights came on dash and car cut off, when trying to restart the car the turns over and will not start, the theft light flashes very quickly and the odometer has no mileage numbers showing, only dashes where mileage should be, towed the car home, have tried to reset (PATS) Passive Anti Theft System, however car is in the same mode. Tried the other key for the car and still the same thing, I live in a very small town where it is very hard to find anyone with knowledge on this issue. Any help would be greatly appreciated. Is there a way I can bypass this system totally? Any ideas on what I should check? Anyone ever had this issue and had the car die on them while driving down the road? PLEASE HELP... Thanks

Thanks everyone for all of your advice, I finally found the issue and have resolved all my issues with the car. It turns out it was the CCRM the entire time. Evidently this module just went bad, strange that it went out while going down the road, however once I replaced it everything is back to normal. Thanks again for all the advice!!