As reported, a homeowner used his gun to stop 3 home invaders:

Police say that three armed men broke into an Alexandria, LA home around 4:30AM, intending to rob the occupants.  The homeowner reportedly grabbed his gun and fired in self defense, striking two of the intruders and causing the trio to flee. One suspected intruder is said to have died from his wounds, police say. The two suspected accomplices, one of whom was himself shot as well, each face 2nd degree murder charges, under the felony murder rule, for the death of their alleged accomplice, according to news reports.

Those who are unarmed, or who are armed with an inferior weapon, will often end up overpowered by the criminal, with dire consequences.  Nor can a citizen rely upon the police for protection, as they are minutes away while it takes a criminal who is breaking in just seconds to get to their victim.  It is also important to note that the police will sometimes fail to help even when asked repeatedly, and they are not legally liable for that failure.  Adding to the problem, police are 5.5 times more likely than an armed citizen to shoot the wrong person, meaning that there is a certain degree of danger any time there are armed police coming to the aid of a citizen.  In sum, self defense is often a crime victim’s best – if not only – option.