Turns out the one spreading the rumors was Hashimoto, who did so at the behest of Sakayanagi. Shortly thereafter, Sakayanagi appears before Class C and she informs them she has evidence regarding the rumors about Ichinose.
No matter the circumstances, 
shoplifting is shoplifting.
مهما كانت الظروف، تبقى السرقة
من المتاجر سرقة
Auch in der Not
bleibt Diebstahl Diebstahl.
Fuera por el motivo que fuera, robaste.
Fuera por el motivo que fuera, robaste.
Não importa as circunstâncias,
furto em loja é furto em loja.
Как слёзки не дави,
а воровство есть воровство.