Genuine question, but supposing we were to consider this theory, why would there also, one, be complaints about the cops parading him around as a victory, and two, people saying Luigi was a hero?
Whether you love or hate cops, they are not stupid. I’m sure if there was even an ounce of suggestion that they got the wrong guy, the cops would quietly decide not to be so smug about it.
And to those who side with him, he’s either a hero/idol or he didn’t do anything. Pick one. I myself pick the third choice.
Also, of note, it’s quite a coincidence they found the guy, then found out his name, and then found out his wealthy upbringing, evidenced by the fact he was trying to be as low profile as possible at the time, which would’ve curbed the ability to do all of that in reverse order. If he wasn’t the killer, that’s like firing a bullseye in the dark.
The scary part is, supposing he wasn’t the murderer and the actual one is out there, under normal circumstances, people could post wanted signs to see if someone might find this “actual” killer, but we aren’t under normal circumstances right now, with our circumstances being ones where the turnout for finds would be low in a world where wanted signs of random billionaires hang in random places in New York, with Brian Thompson actually not being a big opponent of society, having come from poor, rural Iowa and wanting to reform the business but lagging due to hoops (only to, then, be killed by someone he had not had under his insurance to begin with).