There was an update on the case:

In a Wednesday night filing in St. Louis federal court, Sam Altman said Missouri’s child sexual abuse statute, opens new tab does not authorize punitive damages for Annie Altman’s claims, and instead limits ​her to “damages for injury or illness” caused by childhood sexual abuse.

Looks like he will get away with it. Surprise surprise. I mean sure, I cant know for sure if this guy did it. But judging by his personality, I think he is exactly the kind of guy who would.