If you are any kind of coon hunter at all, you would know the difference of when your dog is on a coon or on trash. So, in my opinion, a good coon dog and a good owner combined would never run a deer to begin with.
A.) She was a pup at the time.
B.) I can assure you that it only happened once.
C.) She was back the second she heard me whistle for her...about 5 seconds after I realized what she was running.