After weeks fielding questions about the abduction and apparent massacre of 43 trainee teachers by corrupt police in league with drug gang members, Mexico's Attorney General Jesus Murillo has had enough.

He's not the only one.

Facing a grilling over the details of the case, which has sent shock waves across Mexico and triggered outrage at impunity, Murillo sought to wrap up a news conference Friday evening, arching his eyebrows with the aside "Ya me canse," or "I've had enough."