The girl, Lizzie, was a very young psycho, she needed to die. She killed her sister, she was about to kill baby Judith. (she’d also been in the act of smothering Judith when Carol came upon them) She did many other strange and psychotic acts while back at the prison too. shudder. She was a complete whack job.Sociopathic to an extreme.
I just saw the scene where she killed her sister. All I could hear was the movie Psycho's SCREECH...SCREECH...SCREECH...SCREECH...