Had he retreated and waited for back up, who's to say that man wouldn't start killing people. Who's to say that young woman would be alive today. Police are faced with impossible decisions every day, some decisions end badly but to second guess those decisions in situations similar to this, is counter productive. What needs to be done is to re-asses the steps that lead up to this whole incident taking place. Which was for the parole board releasing a dangerous individual onto the streets.
I don't mean to say however that police are infallible, as we all know this is not the case and every force has it's share of bad apples, however in this situation I believe the officer was in the right to discharge the firearm when the suspect pointed the weapon at him.
That's what he's supposed to do (above in bold). What he did was panic and start popping off.
Look, I'm not calling for the cop to be arrested or thrown in jail. I'm also not going to accept people justifying his misconduct just because he's a police officer. The guy who shot and killed the teenage intruder was crucified here because he killed him (and was completely legal), whereas everyone is trying to give this officer a pass because he was in a 'difficult decision'.
He messed up, and a criminal and a victim are dead from it.