An off-the-cuff comment by the attorney general to cut off a news conference about the apparent killing of 43 missing college students has been taken up by protesters as a rallying cry against Mexico’s corruption and drug trade-fueled violence.

During the session that was televised live Friday, Attorney General Jesus Murillo Karam announced that two suspects had led authorities to trash bags believed to contain the incinerated remains of the slain students, who haven’t been seen since being led away by police in the southwestern town of Iguala on Sept. 26.