An issue of what?
Are we supposed to break out the pitchforks and burning brands because
ymu didn't report it at the time and/or hasn't since? In that case, better burn me too, and
existentialist because he took 40 years. What you don't seem to be grasping is that this isn't like reporting to the Old Bill that your car has been stolen. It's more akin to self-harm, because it often involves cutting away the web of defences you've built for yourself in order to "compartmentalise" or contain the psychological effects of the abuse. I was 25 before I could even
mention having been "sexually assaulted" (as it was categorised in law back then) - 16 years after the event - because I'd pretty much locked everything away in order to stay sane. Going to the police was just about the last thing that would've occurred to me, and sure, that quite possibly means that my attacker victimised others, but I was busy (doing a bad job of) holding myself together and didn't have time for "what if?".
So please don't dare put the onus on victims to report their attackers. Most of us have enough to deal with (including in some cases making excuses to family and friends as to why we've undergone a sudden personality change), without people saying (effectively) "you shit, you've allowed other people to be abused!".