AITAH for supporting my best friend and telling him to press charges against my son for stalking his daughter?

A couple of days ago my best friend came to me angry, he showed me many pictures of my 22 year old son messaging his 18 year old daughter and they went on for months, she just turned 18 a few weeks ago, the last one he sent her a dick pic and she finally showed her dad and he lost it, I apologised and said I had absolutely no clue about it, my son lives hours away now, he told me he wants to go to the police about this and I told him absolutely and that I’d have done the same and he did and he reported my son. I still don’t really know what’s gonna happen now but whatever happens it’s my son’s fault, my son tried saying it’s not him but she had taken screenshots and recorded the screen for videos and it’s definitely his account, even the dick pic is his, he has a little tattoo on his hand and it’s there, I’m fucking disappointing and angry at him right now and I don’t wanna support him at all in this, I apologised to the girl and she told me it’s not my problem.
My wife is upset at this, she’s horrified at what he did and she too apologised to the girl but she says we shouldn’t have involved the police, and that I should support him because he’s our son, I ask her if one of her friends sons did that to one of our 3 girls if she wouldn’t go to the police and she gets quite. But she’s still insisting that I should help him avoid any major trouble because it’ll ruin his future and I say he ruined it himself, and honestly my friend is a saint because if some bastard did that to one of my daughters id have sent him to the hospital not the police.
But am I somehow the asshole here for not supporting my son at all?
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