@BusinessGL Asia, like every other country, doesnt exactly excuse an accomplice for murder, even if it's an indirect relation.
Even if Madoka told the police of the crime, she just
explicitly admitted afterwards that, hey, I could have prevented this from happening but instead, watched it all from the sidelines in order to have cause for my friend to go to jail for unintentionally killing my mother.
Just because it's "fucking Asia" doesn't mean that their laws can excuse this obvious moment of stupidity by Madoka.
And while we won't know if Madoka is arrested or not or anything of the like, in the world of the story, she probably won't, just because of bad writing. It could have been an internal monologue instead, but, y'know, I can admit to my involvement with two murders right in front of the police because my revenge is done.