... from Greg Ellifritz at Active Response Training. Plenty of good stuff here, but let me focus on a few.
Greg links to an article from Breach Bang Clear that describes a drill or practice for developing your situational awareness.
He also includes an article from Tier Three Tactical that evaluates the ability of a variety of pistol, rifle and shotgun ammunition to penetrate an interior wall (i.e., sheetrock).
And he cites to an article from Imminent Threat Solutions listing some 35 different places or ways to hide a firearm (generally a pistol) in plain sight. This focuses on having a place where you can readily get to a firearms but that isn't going to be apparent to a criminal. And speaking of staging weapons, Greg also includes an article from Recoil Magazine providing tips on preventing and protecting your family from a home invasion.
Finally, Greg includes a video from Active Self Protection which examined an incident in Utah that appears to have exemplified the bystander effect. The surveillance video takes place at a gas station and mostly focuses on what one man gassing his truck did, or rather, didn't do. A small statured woman is seen running from a red SUV in one corner of the picture up to the man pumping gas, apparently asking for help. A man, also from the red SUV, chases her, and so the woman tries crawling under the pickup, but her pursuer hauls her out, throws her over his shoulder, takes kicking and screaming back to the red SUV, and then drives off. The man gassing the truck just kept what he was doing, finished gassing his truck, and left without even calling the police. Fortunately for the woman, other people at the gasoline station, although they didn't intervene, took down information and called 911, resulting in the woman's captor being arrested and charged with several felonies.
Greg notes that his general attitude is "not my people, not my problem," but acknowledges that the man gassing his truck could have at least been a good witness and called 911.
I've expressed a similar attitude, including in my article on "The Dangers of White Knighting" which discussed an incident in Portland where three men intervened in a situation without ascertaining the facts of the situation (including the aggressor was armed with a knife) with the result that all three men were slashed in the neck, with two of them dying.
There are also lessons to be learned from police experience in domestic disputes where it is not uncommon to have the battered spouse violently attack police as they arrest the abusive partner. It is also not uncommon for a female criminal to feign distress in order to lure a victim into a place or position where one or more accomplices can then rob them. And then there are the stories where someone goes in guns blazing and kills the wrong person, like one recounted by Massad Ayoob of a trucker that went to the rescue of a woman screaming "rape" and shooting the "attacker" who, it turned out, was a vice cop attempting to arrest the woman for prostitution.
On the other hand, it is a morally poor society where criminals can operate with impunity because people, generally, are unwilling to do something. This leads to a criminal class that will become increasingly brazen, just as we are seeing in San Francisco and other large cities where shoplifting has morphed into gang looting.
So is there a balance between being so cautious to studiously ignore the crime and getting involved in a situation where you are placing your own life, liberty, and fortune on the line for a stranger?
At a minimum, as Ellifritz points out, you can be good witness and call 911 or contact the police. That is what the other people at the gas station did.
Whether you can or should do more is going to depend on the circumstances of each situation. Several years ago there was a video that circulated of a brutal stabbing where an ex-boyfriend had tracked his girlfriend down, attacked her on a busy street in a European city, and basically kneeled on her as he stabbed her repeatedly. There were one or two people that tried to intervene, but being in Europe, lacked any means of effectively doing so. I would hope that if faced with a similar situation here in the U.S. that a concealed weapon carrier would intervene.
But what about the situation in the ASP video? I have to wonder how things would have turned out if the man pumping the gas had simply pulled out his phone right then and there and dialed 911 to report an assault and kidnapping? Or told the man from the red SUV something like, "Hold it right there. I don't know what is going on but I'm calling the police to sort it out."