I was upset because, once again, I don't believe that the description of Wesker is a clue to White Lizard. But in principle, anything is possible; maybe that's just Crabby's style of describing a murder. Ple-sen was most likely an urban resident, which is a minus. After this night, I'm even more confused about who is who. And I still can't figure out the clues; I need to think about it...

Added 12 minutes ago
What happened to the Decontaminator? Does anyone understand? I don't. It doesn't seem to be a block; then what is it? These words are also alarming

although he sometimes committed bad deeds.

I think someone from the military worked with Lizard. The murder of Hermit is somehow unclear; they hit him on the head and then cut him, or vice versa; in general, it looks like Mana's style.

Added 13 minutes ago

was as clean as a whistle, although he sometimes committed bad deeds.

Maybe a schoolboy?

Added 7 minutes ago

A crumpled piece of red clothing.

As I understand it, the piece of clothing belongs to the killer; here's what I found; it's Kyle from South Park.

As you can see, he's wearing a red coat. Although in other pictures, it's orange.

Oh, damn, nothing else comes to mind :(