- "Don't worry about those Helghast sir; they're walking right into one of our minefields!"
- —Private Sanchez[src]
During the opening stages of the Helghast assault on Vekta he ran through a hail of Helghast machine gun and artillery fire to Jan Templar's position whom at the time was having problems with a radio linked to ISA's fortress on the other side of Vekta City. Templar pointed out that his actions were reckless, however, Sanchez replied only with a brief introduction before being cut off by the detonation of a minefield that was being probed by Helghast regulars and a Helghast Hover APC.
After the Helghast unit was taken out, he, Templar and a few other RRF troops fell back to another position and held it until the remaining RRF in the area had fallen back. The Helghast proceeded to overrun their position and were eventually stopped after their armored support was halted by the remaining mines. Sanchez later dies from severe injuries after his squad is attacked in the Slums of Vektan Slums.
Before he dies, Templar begins to inject him with a medical syringe but Luger stops him and collects the information on where the spy was being taken. The young man dies just prior to alerting them that the spy is half Helghast.