If you knew your friend was intending to use what you taught him to make the fake ID you may catch a little heat for it. If you had no idea what he was going to do then you really can't be at all culpable for it. That's like blaming the gun industry for criminals using guns.
Even if you taught him how to make the fake ID it's not the end of the world. Continue being honest. If it was fairly recent it may temporarily prevent you from getting hired. Worst case scenario you need about 5 years from the time it happened to get hired.
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The beatings will continue until morale improves.