Responses
He's suspicious but Eiji said that the family has alibi when the murders happened but maybe the alibi would be proven false in the future
The entire family (dad, mom, daughter) went on vacation in the middle of the murders, so either he somehow snuck away from them to kill multiple times (highly unlikely) or it's not him.
All of you are saying third personality but personally I say tht adopted father... He knew his father while in juvie, I think he's the true LL th it makes sense because earlier he was talking about how a couple murders happened when his adopted father went on vacation to the mountains. Idk who killed black hair girl so the third personality makes sense for tht situation but the True LL definitely has to be the adoptive father. Theres absolutely no way it isn't him.