Why should FBI be interrogating people without their lawyers present, when they have no evidence of a crime? The FBI should not be deploitng Gestapo/Stasi denunciation tactics on anyone.
Talking about tear gas in the privacy of one's home is not a crime. If that appliance repairman was the "informant", he should be in jail for wiretapping.
Nope, if you are stupid enough to talk about important confidential topics in front of rando strangers you have no expectation of privacy. These are the types of people Chinese spies target and harvest information from, if anything this staffer should be let go for mishandling information.
Talking about tear gas in the privacy of one's home is not a crime. If that appliance repairman was the "informant", he should be in jail for wiretapping.