sleepYou're probably aware of sleepwalking, sleep-eating, and even sleep sex ... but have you heard of sleep murder? That's the phenomenon behind the case of a man in Wales who killed his wife of 40 years, allegedly while asleep and dreaming that she was an intruder.

Portrayed by the defense as a "devoted husband," Brian Thomas, 57, was freed by a judge who said he bore no responsibility. The couple was on vacation in a camper park when their sleep was interrupted by younger vacationers who were racing vehicles in the lot.

Thomas claimed that, even after relocating their camper, he dreamed that he was fighting one of the men from the lot, and woke up to realize it was actually his wife.

His daughters testified that they've seen their father sleepwalk and act strangely in the past. Yet, somehow, a psychiatrist for the prosecution said he was not a threat and should be released.

If this sets a precedent that one can not be held accountable for their actions while asleep, we may start having dreams that we're super-rich and rob a few banks at 3 in the morning.

Tell us: Should a person be held responsible for his or her actions while asleep?