The fucker is 47 years old. 47!!! What version of "consensual" was it?
She was 17. It is your position that a 17-year old could never give informed consent? That's pretty much the law's position (and it is demonstrably stupid, and almost always harmful, and so out of touch with reality it's almost frightening.) If you're going with "age line in the sand" to define 17 year olds as incompetent by definition in such matters, then you are all those things the law is, and we're done -- take your torch and pitchfork and have at it.
Get here? Ok, then I presume that is not your position, and that you agree that at least some 17 year olds can indeed give informed consent. So the next question is, is it your position that such a a 17-year old can give informed consent if the partner is also 17, but not if the partner is 47? Because I have to tell you, that kind of thinking can only arise from magical bullshit, and I'm fresh out. Anyway...
I shouldn't have to even ask this, but given the twisted, peculiar nature of your post, I presume you agree that the 47 year old can give informed consent, yes?.
Also, at least get your terminology right. A pedophile is someone with a sexual interest in children. Which is horrific and creepy, because children aren't sexually mature and so sexuality, by its very definition, isn't part of their normal and customary worldview. And putting it there, or trying to, is abusive, in the fundamental sense of the term. You know, child abuse. Because they're children.
An ephibophile, on the other hand, is someone with primary or exclusive sexual interest in mid-to-late adolescents, often described as ages 15 to 19 (but perhaps much more accurately defined by the single criteria of being physically a sexually mature human being. 15 is not a magic number, no matter what your astrologer has been telling you.) Note that if this is not your primary or exclusive interest, then you're just a typical person. Because sexually mature bodies are typically of normal and healthy sexual interest to most who are sexually active. Which is not to say that the first word out of a teenager's mouth might not send most 47-year-olds running away screaming, but that's really not the same issue.
Also note that for many teenagers (I want to say all, but I have not met them all) sex is pretty much the #1 subject on their mind. Learning about it, having it, exploring it, and so on. The whole shebang, as it were. And this is precisely correct behavior from the POV of the body's various clocks. Socially, we have to deal with the hangover of superstition and Victorian insanity, but the fact is, many teenagers (definitely including the 17 year old demo) are having great, happy sex all the time and the vast majority of those so engaged are both glad of it and not even fractionally interested in any contrary opinion of yours thereof.
Sometimes sex is about relationships and all of that. Complex, interrelated, even a matter of power or submission. Which can be wonderful. Rah, rah. But sometimes it's just sex. Hot, steamy, bouncy, hanging-from-the-chandeliers physical activity with a bang. Or several. Ahem. In such a case, and in the instance of informed consent, I see absolutely no barrier to sex between a 17 year old and a 47 year old, any more than I see a barrier between a 17 year old and a 47 year old that should prevent them from playing tennis, or chess.
Here in Montana, the age of consent -- below which "sex without consent" can be charged -- is sixteen. It's still stupid as there will be (mostly) exceptions on either side of the rule, but the point is, were that guy here, no one would even blink, legally speaking.
Seems to me that you put your Outrage Panties on a little too tight this morning.