I don't know. Ask a cop. ;-)
What I wish to do differs from what I can legally do. In Virginia, one can NOT use LETHAL force on someone who is fleeing.
What you can "legally" do is often obfuscated by those we've entrusted to write the laws within the boundaries "We the People" set. Acting outside those limits, law-writers have done a lot to ensure that real justice is denied to the victims of a crime.
While I do not condone the more extreme examples of vigilantism, the victim gunning down the criminal at the point of the offense is the cheapest and most accurate form of Justice ever devised.
Don't want to be gunned down by your intended victim? Don't be a criminal.