Okay My Boyfriend Struggles With A Heroin Addiction And To

okay my boyfriend struggles with a heroin addiction and to stay away from that he buys suboxion and does a little piece a day and I watch him but he works 12 hours a day and lately when he comes home he looks high on heroin to me but he keeps saying"you seen me do sub" so my question is, is it possible he could be doing heroin before he comes home or is it too soon