Mafia 110. Heckelia

Then why didn't Dario die?

If it wasn't Dario, but Shizuo, then such a scenario is quite possible. But if Dario was the one who acted, then yes, it's a valid point.

Added 1 minute ago

How did Yashura's nickname end up in the newspaper if the explosion happens early in the night, and successful treatments and protections are not displayed with the victim's nickname?

It seems I missed that detail. But what was it, then? Isolation would have prevented Yashura from running into the bomb, so that's not an option either.