Mr. Turner was convicted of three counts of felony sexual assault for the attack, which took place in January 2015. This week the judge in the case, Aaron Persky of Superior Court in Santa Clara County, Calif., came under withering criticism from the public for the sentence he imposed: six months in jail and probation.

Ms. Rasmussen’s letter was part of a package of letters sent to the judge on behalf of Mr. Turner before his sentencing, a standard practice in which people seek to influence a sentencing decision by sharing their experiences of the defendant. His father also sent a letter that had an even more explosive effect when it was made public this week; he said that the episode had affected his son’s appetite and that, in particular, he no longer enjoyed rib-eye steaks.

Following the firestorm her letter provoked, Ms. Rasmussen said that her words were being twisted and that she was being unfairly stigmatized. “This appeal has now provided an opportunity for people to misconstrue my ideas into a distortion that suggests I sympathize with sex offenses and those who commit them or that I blame the victim involved,” she said in a statement.

Ms. Rasmussen also believed that the letter to the judge was private. But a spokesman for the court said she was wrong — such letters, like most documents entered into the court, are a matter of public record.

Within hours of Ms. Rasmussen’s letter being made public by New York magazine, Good English was removed from a roster of Brooklyn venues where they were scheduled to perform in the coming days, including Rock Shop in Gowanus, Industry City Distillery in Greenwood, Gold Sounds in Bushwick, and Bar Matchless in Greenpoint.

“We don’t want to be affiliated with anyone that’s going to try to victim-blame or even just downplay rape,” said Larry Hyland, an owner of Bar Matchless.