Sounds like I could be sitting in the front yard having a glass of tea with a neighbor who, unbeknown to me, is a monster and become implicated.
I really doubt that Ariel confided in anyone. What would he say? “Hey..I got these three kidnapped girls in the house. They have been there for 10 years”.
In any case the girls..no, ladies, will at some point say if anyone else was involved. I suspect they already have or the brothers would not have been released.
Psychopaths are a lot more common than you’d believe, but most aren’t committing crimes. We also, in our lives, come across a lot more victims than we’d believe, but we often fail to recognize the signs that they are in trouble.