There was a Globe & Mail article discussing how the interview Danielle Rideout did with the victim had different questions and answers than what the police had probed.
Also, the victim went to police first, tried to rescind her claim, then rescinded her previous rescindment, so I think the police felt they were in a "he said, she said" type of scenario and didn't pursue charges. This doesn't mean the police didn't think something uncouth had occurred, it just means that there wasn't enough in the claim to warrant resources for a criminal investigation.
This was also at the beginning of the MeToo uptick, so I'm guessing police sensitivity and training was lagging a few years.
edit: to clarify, the victim had told player 1 that it was her mom pressuring her to go to the police, and that she would work to make it go away, but this was only in discussion with player 1 and not reflective of what was actually happening