F.E.G.S. (Fuerzas Especiales Grupo Sombra) is an armed wing of Cartel del Golfo – if I understand it correctly.
In the video below, which I understand was filmed in Veracruz, Mexico, FEGS sicarios slowly behead a naked man with taped face. The beheading starts with what looks like a pocket knife. It’s dull and the killer works as if despite global cooling, it was hot that day in Mexico.
After the decapitation, FEGS begin to dismember the body. Long video = long suffering.
Props to Best Gore member @natural-selection-2 for the video: