Ex arrested

So my ex/father of my child was arrested today for having sex with an underage girl. I'm beyond upset mainly for the fact that he is looking at 15 years in prison and what that will do to our daughter. The girl he supposedly had sex with is only a few years older than our daughter. I'm disgusted, pissed, and confused. He obviously denies it and knowing the girl I agree that it is unlikely however I am pretty positive that this isn't the only underage girl he has slept with (this would be the youngest though). I guess i don't really have a question I just needed to vent.