beta
I only read a few random chapters to get an idea of what this was about, so I could’ve missed something, but it seems kind of obvious that the guy who raped the MC at the beginning of chapter 3 killed his mom… He said he’d been searching everywhere for the uke, so he most likely went to his home, and he killed the mom during his search. He seemed to be in a kind of out of control state when he found the uke, so he’s my guess for the killer, not one of the brothers.