The CPS have decided that there is a strong case disclosed, one which will likely result in conviction, and that means that they feel that each complainant is credible..
There are a number of reasons why the complaint of a 15 year-old might not have been pursued. First is that there may not have been a complaint to police, simply because of the fame and supposed power of the suspect or simply because the victim feared she would not be believed. Second is the old rule about corroboration being essential. The distressed state, shock, and immediate complaint of the victim was not corroboration. The pernicious rule, outdated in 1967, had many a rapist acquitted or not charged at all.
Goodsoulette, whose account was it that you heard or read ? And when was the case? Under the present law, a virgin, both before and after, can be raped, because vaginal penetration is not now required for rape or attempted rape.More likely, given the age of the complainant, is that she simply did not come up to proof in the daunting circumstances of the courtroom.