Mood:  not sure

Ok this is not going to sound good,but I think my husband my be snorting pain pills..I found some and thay looked like he may have been shaving them..I asked him and he said I was dum,that people do not snort pain pills and that it was not shaved but he had cut the pill in hafe with a knife...How can I find out if he is snorting his pain pills????And are the signs in some one diff,then some one just taking pain pills?