Possibly but if HC was causing a scene outside his work place or home would this not draw unwanted attention to him also. Maybe AC's family pressured him into making a complaint. If I was AC and i was innocent regardless of previous bad blood i would sympathise with HC's feelings, his sister his missing and his emotions are running away with him , not sure I would want to press charges on him. Id be happy with a stern word from LE but maybe that's just me.
The removal of posters worries me , why would anyone want to hinder Leah being found, even kids aren't that callous surely!
I have my own theory and unfortunately I think Leah was involved in a situation that was bigger than she ever imagined. I believe she has been harmed, I hope I'm wrong but given the length of time she has been missing I cant see another ending.
My heart goes out to her family.