Sure the system failed her, like it does thousands of children everywhere. But they don't all turn into child killers and junkies. Many of these kids won't accept help even when it is given to them. She will never have my sympathies for her past after the brutal, horrifying act that she has admitted committing. Nor will I ever believe that she was or could be manipulated - by anyone.
Personally, I'm not sure I believe that either one manipulated the other. Had TLM not wanted to do it, she wouldn't have, simple as that. Whether he was an active participant or duped into it or just in the wrong place at the wrong time is up to the jury to decide. Yes, it would have been nice if he had taken the stand and told his side. But there are disadvantages to that, regardless of whether he is guilty or innocent. The Defence is there to prove reasonable doubt. IMO, they have raised some serious questions about the Crown's theory. Whether it's enough is anyone's guess. Not much longer and we'll all know.
JMO