I ain't gonna enter the quote fest as we're already at a page per post, but here's my view.
He committed the crime, he should be tried, it's that simple. Otherwise do we let off war criminals because they've not tortured anyone for a while? (Only using that analogy as it seems to be the only other crime with surfaces maybe decades later, not for Godwin's Law value)
Now, onto whether the crime is always a crime, I think I'd be open to discussion on that one.
I'm still undecided on this, I feel the current '16' limit in the UK for sexual consent is probably about right, as of course there's girls of 13 who are mature enough to make those decisions, there's always going to be a few who are not ready after 16, I feel it's about the right place to draw a line, as one has to be drawn.
To me tho, there should at least be different crimes for rape, and when a girl gives consent but is too young, especially when the lines are blurry in terms of her maturity and looks.
I've seen girls under 16 who could pass for 20 easily, and I doubt 'carding' them counts as romantic.
Also, its just a fact of life that the moment puberty hits, humans start fucking, we just need to keep it socially unpopular and illegal to lower the amount of teens with kids, I know it doesn't fix the problem, but I think it would be a lot worse without the rule there.