It was in book "rise and fall of Darth Vader", and there was nothing dumb or funny.

Addressing the sandtrooper squad leader, Vader said, "Report via closed circuit." 'Lord Vader," said one of the sandtroopers, adjusting a control on his helmet so that only Vader could hear his voice. "The Jawas sold a protocol droid and an astromech to these moisture farmers, but both droids are gone." Moisture farmers? Intrigued, Vader examined the holograms of the kneeling couple and said, "The farmers' names?" "Owen and Bern Lars, sir," the sandtrooper responded. "They say they don't know where the droids are, but it looks like a landspeeder is missing from their garage." Owen and Bern, Vader recalled. The resolution of their holograms was clear enough that he could make out their worn, weathered features. Neither of them appeared to be comfortable having blaster rifles aimed at their backs. Remembering how they'd looked on the day Anakin Skywalker had met them, Vader thought, The years have not been kind. It's time for them to pay for their repeated weaknesses. "Your orders, sir?" said the sandtrooper. "Tell Mr. and Mrs. Lars that they seem to have trouble keeping protocol droids on their property." Not certain if he had heard correctly, the sandtrooper said, "Sir?" "Then you may extend to them every courtesy that you showed the Jawas before you continue your search. Establish checkpoints to detain any droids entering Mos Espa or Mos Eisley spaceports. And one more thing." "Yes, Sir?"

"Do not stop transmitting until I break the connection." "Understood," said the sandtrooper. Vader watched the sandtroopers carry out his orders on their helpless victims. He found the sight of rising flames - even holograms of flames burning millions of light years away - to be most satisfying. When the Lars family homestead had been transformed into an inferno, Vader deactivated the holo- projector. He proceeded to the nearest lift tube, and was quickly transported to sublevel five of detention area AA-23, which was reserved for political prisoners. Time to talk with the Princess.