Citation(s) from the GunPolicy.org literature library
Cantor, Christopher H, J Brodie and J McMillen. 1991 ‘Firearm Victims: Who Were They?.’ Medical Journal of Australia; 155 (7), pp. 442-446. Brisbane: Australian Medical Association. 7 October
Among all 587 firearm deaths in Brisbane, 1980-1989:
We found only one definite homicide by a civilian killing a felon … (i.e. the odds are 586 to 1).
The statistics also suggest that it is more likely that all family members will shoot each other dead before any external aggressor is killed.