Bear in mind, about the only way you can help your friend is if YOU admit to the drugs being yours and take full responsibility for them, and do so in a way that the authorities will believe that your friend had no involvement and not even any knowledge of the drugs. This means, however, that you then take the consequences (e.g. jail) for drug possession. That the girlfriend is backstabbing, robbed him, etc. is not relevant to the drug charges: someone owned/possessed them, and someone will have to take the punishment for them.Think carefully before doing this, and please consult in person with an attorney to understand better what you could be facing if you do this.