The rules of evidence in federal courts are not that loose. Note what he is accused, not convicted. Note he is contesting the accusation of drugging the toddler. They really got him on the importation of quantities of a variety of controlled substances (don't know that these are actually narcotics either) unless his lawyer is a complete clott the drugging the toddler will not stick.
I found Bacardi Dark Rum worked on my daughters gums when teething, but that is as far as I ever got. Her brother liked Jim Beam at the same stage.