Georgia DOT Pulls a driver over in Tennessee by: The Crazy Trucker
I would think that if the lights were flashing on you when you were in Georgia that the DOT or highway patrol can cross the line behind you at least for a certain distance.
I am not 100% certain though.
To be 100%certain call the Tennessee and Georgia Department of Transportation and Division of Motor Vehicles.
You might also want to contact a Georgia traffic or commercial vehicle lawyer.
Would love to know what you find out.
Curious...
Did he/she have the lights on before you crossed in to the state of Tennessee?
Did you see him/her and thought you would try to get across the line and they would stop?