"said they found traces of opiates.."
I just get angry when I hear this. No one has ever gotten high off "traces" of opiates.
Mere poppy seeds have gotten people in trouble using this approach.
Just tell them to show you the Mother Lode of opiates you're smuggling (or a single granule) or let you be on your way.
Nixon's long gone, so should be the Drug War he helped create.