That is correct as I understand it. None of the abovementioned incidents used an MG
As far as we know, since 1934 only one legally registered MG was used in a murder by it's registered owner. That was an off duty Ohio Cop who was moonlighting as a drug dealer. he used his personal MAC to take out a rival drug dealer.
OTOH, since FORD Motor Company was the number one purchaser of MGs during the 30s (for "labor relations") and their union buster was a mob hitman, well do the math.......