Let the cops take care of it. I think doing something like that might come back and bite you in the a$$, unfortunately...
Yes it most certainly would.
This is how that would play out:
First when the cops get there, the shooting has ended as usual, so they are too late to intervene which they wouldn’t do anyway because they would be too busy putting the entire city on "Lock Down". It’s clearly over now but they will put everyone on “Lock Down” anyway.
They would find you, the person that had just stopped the maniac killing spree and saved lives, draw down on you screaming at the top of their lungs for you to drop your weapon and lay face down on the ground.
At this point you would have a knee in the back, being handcuffed and arrested like you were a fugitive mall shooter
You are put in the back of a squad car as TV crews and dozens more SWAT cops show up.
You are hauled off to jail and your weapon is seized as evidence, later to face a grand jury and the DA while you drain your life savings just to retain legal counsel.
At the scene are TV crews and now more cops than you can count all dressed up like they are Delta Force standing around looking authoritative displaying MP5 Submachine guns, M-16's, Flash bang grenades and interceptor body armor.
If you avoid prosecution which you may or may not, either way you will be left with anywhere from sizable to life long legal bills. You will never see your rifle again.
With that in mind !, the SKS is a great trunk gun!
I carry a Chinese paratrooper SKS. Inside the case is a belt with pouch and 10 loaded stripper clips. Another pouch holds some cleaning supplies. The belt also has a fixed blade knife attached.
Also I have carried this rifle for 8 years or more. The ammo (a mixed lot of Chinese steel core, Yugo brass, and Russian commercial) was in my trunk for at least 7 years +. This was 24/7 exposed to Texas heat in summer and cold in winter. Last summer I fired 40 of the 100 rounds and all worked flawlessly. All ammo types were fired both close range and at a gong at 300+ yards with many hits.