This is the ATF we're talking about, remember? Reasonable and responsible doesn't seem to be their hallmark.
Their side of the story will never get told, they'll just settle this at the taxpayer's expense and continue merrily violating the law and our rights.
Here’s the filing http://www.scribd.com/doc/95498950/Griego-v-Steinhage, which alleges the defendants relied on a two year old address listing and had no “lawfully executed” warrant.
Interestingly, the lawyer David Lane has a wiki page because he is a member of the ACLU and represented Ward Churchill.