Kenneth Parks committed one of the strangest and most controversial crimes in modern history. In 1987, he drove fourteen miles in the middle of the night to his in-laws home and attacked them, leaving his mother-in-law dead and his father-in-law severely injured. Then, covered in blood, he walked into a police station and confessed.

But Parks insisted he had been asleep the entire time. Doctors found no signs of psychosis, only a lifelong pattern of sleepwalking and night terrors. His defense argued that he experienced a violent sleepwalking episode and never woke up during the attack.

In a shocking outcome, the jury agreed. Parks was acquitted of murder and walked free, creating one of the most debated legal precedents in Canadian history. He has lived quietly ever since, with no further violence.

So what do you think happened that night? A tragic medical mystery or the perfect excuse for murder?