His ex-wife's word. I've personally seen women in my life lie about various kinds of abuse, just to win custody or fuck over their ex, then brag about it to me and everyone that they're so clever using the system like that. This seems like more of the same.

Her story doesn't pass the smell test. "He forced me to go on Craigslist and fuck random dudes! He's the degenerate one!" Reading between the lines, you see that the police think her story is so bullshit, they don't even check her phone for the child porn photos or messages she claims he sent to her.

True, but in the past this kind of reprobate behavior (just the texts and "pillow talk") would be enough to run someone out of town or make sure they can't work with kids. There should be enough shame that he would want to drop out of society even if no actual crime was committed.

He certainly admitted to parts of it (let's see if the child pron allegations actually pan out). From the transcript:

A (the man): That was - that was her idea. And that was total, like, role play stuff. ... A: So we'd talk at night and she used to wrote stories...should would write one and say "You take this role, I'll take that role and..."

So he doesn't seem to deny "roleplaying" about his wife fucking three school kids, he just claims that his wife started it.

Maybe I'm an old-fashioned prude, but if my wife started dirty talking and wanting to "role play" about fucking kids the same age as our children, that would be the end of the relationship. Like, immediately.