Hrm. You made a very specific (and false) claim, got called on it, and now you say "references to... trying to..." in apparent attempt to weasel around it.
Neither the FBI nor Capitol Police has made claim that any lethal gas was present, period. Not in possession of "Oath Keepers" or otherwise. Not in "underground tunnels" or anywhere else.
No reputable news agency seems to be claiming thus, either.
So, the burden is on the claimant to show that this isn't pure narrative fantasy.
Neither the FBI nor Capitol Police has made claim that any lethal gas was present, period. Not in possession of "Oath Keepers" or otherwise. Not in "underground tunnels" or anywhere else.
No reputable news agency seems to be claiming thus, either.
So, the burden is on the claimant to show that this isn't pure narrative fantasy.