El Cartel Del Golfo (CDG) beheaded this girl as a response to the murder of Comandante Gallo – one of top CDG commanders who was also reportedly decapitated by Los Zetas.
Beheading of this captured young Zeta started with a mandatory pre execution interrogation after which the girl had her throat slashed with the machete. Her hands were in handcuffs, but were cuffed in front of her, not behind her back. That messed with the decapitation a little and so the sicario decided to twist her neck instead. The head didn’t snap all the way so machete chopping resumed and then the final twist was delivered.