Danno you may have inadvertantlly given the cheats a new defence ploy by using somnabulism as an excuse. Old mate is sleeping deeply, dreaming up ways to beat his rivals and sleepwalks out to the stable, picks up the the needle, does the deed and wanders back to bed, totally oblivious of what he has done. Because the act is done at such a low level of consciousness, a defence could be mounted that there was no intent by a fully functional person. However, he may have trouble explaining how illicit substances came to be in the stable in the first place!!!