[cgbg]

I believe that is the ad hominem fallacy.

https://en.wikipedia.org/wiki/Ad_hominem

[NautiNurse]

Whatever floats your fallacy boat:

Scott Ritter, 50, was taken into custody immediately after Monroe
County Judge Jennifer Sibum sentenced him to 18 to 66 months behind
bars. It was the second time in eight years that Ritter, of Delmar, N.Y., found
himself in legal trouble for trying to lure underage girls into illicit sex. source

When Emily told Ritter, "No, I'm 15," Ritter said, "Aha, my bad. I didn't know you were 15." Ritter, who testified to not really believing Emily was 15, then continued talking to her and later sent her webcam images of himself masturbating.source