anglolawyer
Banned
16-year-old Brenda Ann Spencer, who fired at children in a school playground at Grover Cleveland Elementary School in San Diego, California on 29 January 1979, killing two adults and injuring eight children and one police officer. Spencer showed no remorse for her crime and her full explanation for her actions was "I don't like Mondays. This livens up the day".
Doubt you even know where the wheelhouse term comes from
Personally, if the girls argued all the time it wouldn't add the likelihood of guilt of Amanda. Now if AK had threatened to kill her, that would change things but of course that isn't a motive.
ETA of course Brenda was nuts.
It would evidence the existence of an unspecified motive, which is adjacent to the real thing. I don't like Mondays either.
I do know too where the wheelhouse thing comes from!