unless the drug dogs were there at the scene of the stop from the beginning, he could have just refused and the longer the dogs took to arrive the better for him. Obviously he's guilty as fuck but his lawyer would have had more avenues for his defence. There are some laws and rules about the lengths of a stop and the time it takes a drug sniffing dog to get there, police can't just hold you for no reason waiting for a dog. Im not a lawyer or anything so i could be wrong.