All I would say is that I do not consider Han Solo evil (at least based on what we've seen in the movies). Chaotic neutral perhaps, but not evil. I'd say the same of Captain Reynolds of Firefly fame who once killed a prisoner who promised to hunt the crew down and get his revenge once he was released. Was it a good act? No. It may have even been "evil", but there's a difference between being proactive on your self defense strategy and murdering someone who means you no harm.
On the other hand there was a mention of a different character that claimed to be chaotic neutral serial killer. Unless he really meant
cereal killer (and what's wrong with Cheerios?) I would say that a person who gets their jollies from murdering innocent people is Evil.
Like many things in D&D, I consider alignment a shorthand. If I have a player that has a question about where I would draw the lines, we can discuss that.
Anyway, we've already hijacked this thread enough.