Our advice is that you should not lie about "unrelated chemicals onboard." You do not have objective, prima facie evidence to prove what any of these noted (21) vials contained, much less that they were "onboard". The PRC male was arrested prior to boarding the aircraft. He worked at Harvard with Dr. Lieber. (Yanqing Ye worked at B.U. in Boston.) And, he had the noted vials hidden in his socks. Lt. Yanqing went back to the PRC last year, in the fall. You do not have to be "strong" to have common sense. The details of these arrests will come out eventually. The "unrelated circumstances" you describe are moot. We opine that the FBI was observing these (3) subjects for quite awhile before the arrest warrant were issued. And, they still are while they are out on bail. Ms. Lieber's passport was siezed. Keep in mind that one form of warfare is biological; others are tactical, strategic, etc. This is a serious matter.
Do you see how you are WANTING it to be true that these three were involved with the virus? There should be no desire for a specific circumstance because than it is no longer a "fair trial". You have already chosen who is guilty , now you are invested in your decision. So you will only look for what confirms your decision and you will find a way to discredit that which suggests otherwise. This is what happens with every conspiracy theorist as well. People want to make sense of a complicated situation because it is uncomfortable to leave the case open. We think that by coming to a conclusion , we can take action sooner and remove the problem asap. But if we are taking action in the wrong direction out of haste, not only is it a total waste , but you're now hunting innocent people, so you have become the problem. And then soon people figure out your mistake , they come for you.