Hmmm... I wonder what sort of information would bring a passle of armed IRS, ATF and EPA operatives running to assault an abandoned house?
Good question. We do know that the Department of Education sent in a SWAT team to arrest a woman for student loan fraud, at the home of her ex-husband.
Now that non-police federal agencies are authorized weapons and thugs, if they want them, and some do, were someone to do this, they would have to be specific to get that house raided by the right SWAT team.
This is on top of the 100+ federal police agencies.
http://en.wikipedia.org/wiki/Federal_law_enforcement_in_the_United_States
Only one thing is for sure: if you are home invaded by masked men who smash down your door and come in guns blazing, if they are criminals, you can shoot them dead; but if they are any kind of police, you will have committed murder, even though the two groups looked and acted in an identical manner.