Having spent close to 20 years in the bungalow scene, I find your senario very hard to accept at face value for lots of reasons:
1 – was this girl a child of a resident or a mothers helper?
2 – what was the age of these 2 kids? are we talking teens?
3 – the girl is rarely the agressor,so the whole story seems fishy
4 – my unit’s walls are so thin, I can hear my neighbor shirt hangars scrape across the pole from my side. Know how many instances our place has had of foul play? ZERO. Know why? Because we set up hardline gedarim (guidelines) to make sure nothing goes wrong.
Now, were you to tell me that this happy couple met in the bowling alley at 1:00am, that I would believe, but what were they doing out at 1:00am?
Of course, it COULD have happened, but I somehow doubt it played out the way you describe it. Good bochurim are rarely stalked like this.