About 15 years ago i had an issue and the feds were not only bothering me but they were threatening to arrest my girl. I obviously wasnt happy about it and my lawyer said: " belmont, you have to understand, they feel they wear the white hat and you wear the black hat, they dont see it as hiiting below the belt".
In other words, whatever it takes to get a conviction, the feds will do it. They firmly believe its for the common good despite collateral damage.