well, I'm betting he had a residence at one time in his life and that is when he bought the guns.
That was my thought. On his way to down and out, he kept hold of what he could that was useful, valuable and portable.
But
Robert Johns was on their radar, and when they searched his vehicle they found a sawed-off shotgun, a 9mm semiautomatic pistol, 14 knives and more than 5,000 rounds of ammunition, police said.
Assuming the paper's reporting that right, the short barrel shotgun is going to be a problem. Unless he should be so fortunate as to have the appropriate Class III paperwork.
A new question for the gunboards to thrash over: "what one gun for when you become homeless?".
Alarmed, they also asked whether they could search his car, and after he agreed ...
<sigh>. I suppose if he'd refused permission for the search, they'd have found some excuse to anyway. It not being, you know, a real home.
It sounds like there may be some mental health "issues" with this guy. Again, assuming the paper got it right.
(Something's nudging at my memory -- I think there was a case recently in Illinois, about homeless people and RKBA. I will see what I can find.)