The Sleepwalker Killing (1997) (movie): Can a sleepwalker commit murder? Mark Schall admits being guilty of murdering his mother-in-law. In his defense, a team of lawyers attempt to prove that while Mark did in fact carry out murder, he was not awake when it happened. Discover the latest Discussions, Reviews, Quotes, Theories, Explanations and Analysis of The Sleepwalker Killing (1997) below