I have no reason to give her the benefit of the doubt. She could be justified, or she could be guilty of a crime. That her 'excuse' in the article was 'he looked like he might', and that the police said he 'probably was going to' all lead to back to the concept of pre-crime and extracting justice/punishment for something never done.
Ah, not exactly.
It's actually a pretty basic concept in self-defense, both tactics and legals, that you do NOT have to wait for the other guy to ACTUALLY throw a punch or shoot a bullet at you before acting. All that is required is probable cause that he is about to do so.
This is based on three things: ability, opportunity, and jeopardy (or apparent intent).
Ability: CAN he carry out this threat? Steven Hawking couldn't credibly threaten to whoop yer ass, but Chuck Liddell sure could. A man carrying what appears to be a firearm has the ability to shoot you.
Opportunity: Is he capable of carrying out this threat NOW? Are you in range?
Jeopardy/Intent: Is the subject behaving in a manner that a reasonable person would feel was threatening? Has he cocked back a fist and stepped closer, or pointed a weapon at you?
Given what she knew, this situation fulfills all three points and creates Jeopardy, which allows you to legally act in self-defense pre-emptively.
There is no mind-reading or precognition involved, just observation of the subject's behavior.
1. Carrying a shotgun in hand on the street. Ability.
2. In range? Opportunity.
3. Pointed it at her? Intent.
Open, shut, self-defense, case dismissed, says Judge Goshin.