The knock on the basement window couldn’t have come at a worse time.

It was past midnight and Lauren Tepe and her roommates had just finished watching “American Horror Story” in the basement of their off-campus house, Tepe recalled.

“We have a big window in our basement and we hear this knock,” said Tepe, a third-year in psychology. “We were like, ‘What was that?’”

At first, Tepe said it looked like someone was waving at the girls from behind a closed window. But when the girls got closer, Tepe said they realized it was a man masturbating while staring into their room.

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