When is Mutual Aid called in for an emergency and what determines who is called? I was told that when the four girls were killed Ulysses called Lakin for additional help? Why did we not use Critical Care Transport? I was told that if you call 911 and request an ambulace, you can specify if you want GC EMS or CCT. If you do specify of course GC EMS is called. But if GC EMS has all their ambulances and there is a need for another why would it not automatically be CCT? Who knows these answers or is willing to find out?