He apologized to the mom and said he felt terrible after seeing the damage, (he didn't realize he hit the scrotum until after) it sounds like he definitely knows he did something wrong. He may not think it was criminal. I can see how this could be prosecuted if the doctor classified these as open wounds a week after it happened, but I also think it's fair to take into account AP's intent, and hopefully he gets some education / counseling on how to be an effective parent without using violence.