Since we are speaking Thesis - I'll give 2 cents.
IMO, determining whether or not the decision was right or wrong, would depend on other factors which are unknown in your statement. Filing actionable charges unless it is a Protective Order without proof seems somewhat useless.
- was their proof of the threat
- did it appear to be a real threat
- was the threat made under some form of duress
Proof of the Threat
Was this a verbal threat - who else heard it and were they uninvolved witnesses?
Was the treat written in some form and can be linked top the person that made it.
Real Threat / Conditions of Duress
Sometimes people make threats in the heat of the moment, sometimes threats come from people that aren't mentally stable so context would have to be determined as well as the situation surrounding the threat and perhaps the mental condition of the person making it.
Was there a weapon involved during the threat.
It is kind of hard to answer not knowing more surrounding details. I am gonna assume that you were talking criminal charges - protective orders or restraining orders might have been in order depending upon the circumstances - but I think they are more civil in nature, at least until the offender breaks the order.
It's Always Something . . . . Roseanna Roseannadanna