gang help me find a yt series

I dont know much about the context of it but Im super curious abt it because my friend knows it but doesnt show me. I have some piece of info that maybe useful tho. so it was made in 2020 as far as I know. there is a character that my friend likes maybe some info abt him can also help. I think he knows russian but the series isnt russian? His wife and child gets offed by some people and he gets deprsed and becomes mafia. uhh the series is a few episodes I think? ıdk at all. she said it has a VERY small fandom, almost less than 1k maybe. ıdk so does anybody have any clue, I heard he was also a doc.