That happened to me.. I picked up a suitcase at a garage sale in Canada, a few months later I flew to Manchester England. When I arrived there I was taken into secondary inspection, making a long story short, after being searched and questioned the agent said to me “That suitcase at some point has contained drugs, the dogs went straight to it, and the dogs are never wrong “. So when I go to my hotel I got rid of the suitcase and purchased a new one.