This is so fake because they used his mom as blackmail to get him to turn, I don't think it would go like that with the average incel, especially if they have a decent paying job.
It'll be like - "you and your mom will be homeless while we investigate"
Incel:
I like my mom, but sorry, the worst that can come of that threat is that she has to stay with some other family members for the time being and I'll be renting for a while, big whoop, that's their big nail in the coffin that got him to confess. Incels are a lot more "I don't give a fuck" than the episode lets on, when you've spent years dealing with depression and wanting to kill yourself you aren't going to "flip" with such a mild interrogation and such minuscule threats.
Also I don't know if the law allows for this, but if my lawyer is present I'm not even talking or allowing my lawyer to speak on my behalf unless the interrogation is being recorded, so they wouldn't be able to even speak about any underhanded shit like that, they'd have to tell me outside the room, and i'lll be recording then too. After the ordeal I'd definitely be trying to sue.