What a weak premise...
Never have I seen a show focus the main plot-line around such a contrived situation.
The USB contents could have easily been explained away 'it's not mine ; it's not my son's ; I have an oath to keep ; call the cops if you want, and I will explain to them - but not to you". You know - like a normal person.
I'm sure once she handed it off to the police, the tutor wouldn't have gone around and said that Ben was a Pedo. She would let the Police handle it.
But the plot instead goes the way of 'I must KILL her to silence her'
Other than that I enjoyed it - especially the Prison characters.