We case-study Investigation in Criminology, Security,Protection & Risk because, these practitioners daily interact with crime or terror and could handle life impacting or life & death situations. It is not the weapon but the person this is the primary focus. These practitioners must be able to read the situation, a person-of-interest and the people involved to mitigate or limit the level of collateral damage.
The vulnerability-landscape can change at any time and this could occur within seconds
The biggest nightmare of any professional is not knowing the true situation and who is involved
Out-think and outsmart the criminal!