Truly sorry for your friend, but I have to say it could have been a lot worse. If the article is telling the truth, it said he didn´t plan it, so he had no way of knowing if there was anybody in the building, they could conceivably have charged him with attempted something or other, rather than just arson...
I guess the lesson here is if you´re going to bloc up, do it right, ain´t no fashion show:
¨...despite attempts by Lenartavicius to conceal his identity, police relayed details of his distinctive studded hood¨