Mike's Birthday

"Hello, is this the Drug Enforcement Agency? "
"Yes. How may we help you? "
"I'm calling to report my neighbour, Mike Fitzpatrick! He is hiding illegal drugs inside his firewood. "
"Thank you very much for the call, sir. Let me take down his address, and we will look into this. "
The next day, drug enforcement officers descended on Mike's farmhouse. They searched the grounds, and found the shed, where a huge pile of firewood was kept. Then, after questioning the owner to no avail, using axes, they split open every piece of wood. After not finding any drugs, they swore at Mike, and he swore at them, and then, finally, exhausted, they gave up and left.
Later that afternoon, the phone rang at Mike's house......."Hey, Mike! Did the cops come to your house?"
"Yeah! "
"Did they chop your firewood? "
" Yep. "
"Happy Birthday, Buddy. "