[Balding_Eagle]

“and was asked if they could come in. Sure, he said.”

No warrant needed

[PowderMonkey]

Never consent to a warrantless search of your home. Ever. To do otherwise is to grant consent to search for the "elephant in the breadbox." "Citizen! These bank statements and contracts on the desk of your home office appear suspicious. Accordingly, we're freezing all your financial accounts and contracts while we question your clients. Oh, and we'll have to seize all your firearms as well while we sort this out."

[Twotone]

Well, a voluntary yes probably led to the more relaxed interview. If they’d had to get a warrant I bet they would’ve come back & trashed the placed. And shot the dog!