This story sounds fabricated. I don't understand how they just so happened to raid the house after your friend just so happen to leave guns there?
Meaning you believe the guy fired the guns, and was subsequently arrested.
That may or may not be the case, and the benefit of the doubt is best given to the poster for the sake of polite highroad conversation.
It is entirely possible a shot was fired by someone resulting in a response, it is also just as likely a person with new firearms decided to fire a shot outside, whether safely into a backstop or into dirt, or dangerously into the air.
Either way many cities now have a sound positioning system that locates the general position of a discharged firearm. That alone, or that combined with a report from a neighbor could result in such actions.
So someone safely firing a round into the ground in thier backyard for example would immediately be known as the location.
Someone using fireworks or other loud noise makers would also trigger such a system.
In fact in a city it is an excellent way to frame a known gun owner on the 4th of July or New Years. An explosion near thier home can result in a police investigation, by police that already assume they are guilty.
it just encourages people to make illegal copies, putting (a bit stupid) law abiding citizens in tax a supported prison system.
You cannot put a "law abiding" person in prison for doing something "illegal" that they actualy did.
You are confusing "law abiding" with an otherwise good or unpredatory individual. They are far from the same thing. "Law abiding" is obeying the law, regardless if it is right or wrong.
There are people that will steal property and value legaly from others on a regular basis, within the law. From banking, loan sharks, towing rackets, lawyers who regularly work eminent domain cases etc
They are law abiding, and some actively work to ruin peoples' lives for personal gain.
I have met some people that are good at heart and would never victimize another person or thier property, support and take care of thier family, that occasionaly do something illegal that is relatively minor and victimizes nobody.
They are criminals who are not law abiding. No if ands or buts, they have chosen to not abide by the law.
Someone that has never harmed another person, or deprived anyone of property, on thier way to volunteer at thier local charity after choir practice lets out who willfully chooses to jaywalk across the street while knowing it is illegal is not a law abiding person.
So don't confuse your terms. A law abiding citizen cannot willfuly break the law and go to prison, or they would not be a law abiding citizen.