The whereabouts of the second infiltrator are currently unknown, ASOS refuses to give us any information.
(srry this anim was kinda rushed)

Recovered frame from the scrambled data during the second infiltrators invasion.
The neurotoxic gas was deployed into the entire facility by A.S.O.S after every living personnel was evacuated.
A.S.O.S would normally not be given access to the gas, but as part of an emergency evacuation protocol, he was given limited access.