You MAY NOT shoot at a fleeing suspect unless that individual is presenting an immediate threat of death or great bodily harm as he flees.  In plain English, if he’s not trying to kill you or somebody else, you cannot use deadly force to stop him from getting away. 

Which gun is best for home defense? By Joel Persinger

It is an indisputable fact that long before guns were invented, someone invented opinions. And since the invention of the gun, opinions about guns have been popping up all over the place. So much so, that while not everyone owns a gun, just about everyone has an opinion about them. So, it’s no surprise that opinions fly in every direction when someone asks the age old question, “Which gun should I buy for home defense?”