Rather than second-guess actions that took place in a set of circumstances impossible for us to visualize accurately, I'd like to offer some general tactical advice :
1) If you encounter a potential threat that makes you feel uneasy, you should normally trust your instincts and avoid it ( Don't get on the elevator with the man / reverse course instead of walking by the crowd of high-schoolers etc. ) . Remember that you have a right to "profile" all you want ; If a person's race or clothing worries you, you have a right to avoid him .
2) Don't slip into believing everything will be okay because you carry a gun . Someone could get the drop on you, sucker-punch you, shoot from ambush or whatever .
3) Consider a less lethal alternative such as pepper spray, metal flashlight, a tactical pen or a personal alarm for situations in which deadly force may not be ruled justifiable in court .
4) Walk confidently, stay clear of alcoves and other hiding places, check behind you, walk facing traffic, stay a few feet away from your companions for maneuvering space and consider using a tactical flashlight to occasionally check ahead and around you .
5) If confronted by a suspicious person, consider shining your flashlight into his eyes . Order him to 'stop
' and not come any closer
. If he advances after your warnings, consider pepper spraying him or drawing down on him . If he advances on a drawn gun, consider firing and sorting it out in court .
Don't draw unless you are prepared to shoot .
6) Your first priority is to save yourself . Whether your actions will pass muster with the police and courts is a secondary consideration . Shoot when you have to but not just when you can get away with it .
7) Do not tamper with or dispose of evidence ( no dragging bodies back inside or planting of kitchen knives ) . Do not flee the scene to avoid arrest . Do not contaminate the crime scene or allow others to do so .
8) 'Two-edged swords' : Be aware that some actions can both help and hinder . Drawing your gun may drive off or allow capture of a criminal but it could prompt him to draw and fire in " self-defense " .
9) Ask yourself if there are any ideal hides and traps in your area for attackers to use ( Is there an underpass on a bike path ? Is there a deserted cemetary next to the parking lot ? )
10) Find out if people around you will call the police to help you or will look the other way . A criminal is like a guerilla ; He swims in a sea of sympathizers ( apologies to Mao Tse Dung
11) Consider carrying an old flip cell phone ( even an unititialized one ) to make an easy 911 call in an emergency . Smart phones are hard to bring into action quickly and are a frequently-stolen item .
12) Consider wearing a black tactical vest, especially if you are unarmed . It will make you appear to be possibly armed and a hard target .
13) Don't forget about knives - a whole 'nuther subject .
14) Plan empty-hand fighting moves for use against a close knife or fist attack .
15) Know that long hair, neckwear etc. can be grabbed by an attacker .
As if we needed more dangers, here's news of a new fad : Blacks playing " Knock Out The Jew " : http://www.washingtontimes.com/news/2013/nov/20/thugs-targeting-jews-disturbing-knockout-game/