Sarah Hubbard knew something was off about her interactions with a piano professor at the Berklee College of Music—they had a “haunting and unsettling” quality, she remembers. Hubbard, who studied violin at Berklee until she graduated in 2016, remembers that sometimes when they crossed paths, he seemed to be “deliberately trying to prolong” their interaction, and sometimes the professor, Bruce Thomas, gave her hugs that felt awkward. Sometimes he would show up near where she was, Hubbard says, lingering just at the periphery of her vision and then emailing her that he’d seen her that day but she’d seemed too busy to say hello. He sent her emails late at night, she says, and once when she didn’t respond promptly, he approached her boyfriend on campus to tell him to tell Hubbard to return his email. (Thomas did not respond to requests for comment.) Hubbard frequently worried, as she moved around campus, about surprise encounters with Thomas, who had been teaching at the school for some ...