> ...I'm not sure that this are regular procedure. If Regular police enter in someone house because domestic dispute or any similar insignificant reason and see drugs, weapons or any other criminal stuff, they have right to arrest householder and seize evidence, even if they come from completely different reasons. In some states they even don't need to enter house they can see 'criminal activity' trough door or window and act accordingly even without warrants. Of course Afro'murica is big country with zillion local laws, but this is more or less general rule. Police must react to prevent crime and or secure evidence. FBI is different beast with even more authorization than common local police. However, someone can stretch, twist rules - laws to justify whatever he want. In fact I remember cases where policeman were accused of negligence if they "don't see" evidence of crime.