Mexican journalists

Karla Micheel, a member of the National Democratic Attorneys Association who represents Vera's family, told AFP that the victims were shot in the head at point-blank range with a 9mm handgun fitted with a silencer. The gun was "clean," meaning it had not been used in other crimes and was loaded with untraceable bullets, said Micheel, who has seen the investigation's report.

Carmen Aristegui, one of Mexico's most influential broadcast journalists, had been publicly feuding with her employer, MVS Radio, in recent days after two of her investigative reporters were fired by the company.