my stepsons used to beg us to not take them home when younger- they would go quiet and sit sunken into the car seats and WE felt AWFUL returning them. they were neglected- clothes stank of urine- stiff with it- a time of my life that i hate to think about.
(DH's EX was investigated and found to have abusive partner- social services took boys away from her- foster care- then as soon as they consulted me and DH about temporary care- but she booted her partner out- got kids back.
lots more i could say- just wanted to explain why I think it's possible that shannon may well have not wanted to go home- may have chosen to be where she was.
i used to lock myself in bathroom for hours to be safe at home.