The Case of the Sleepwalker's Niece — Erle Stanley Gardner

THE SLEEPWALKER'S MURDER

Pretty Edna Hammer asked Perry Mason an odd question: "Is a person who sleepwalks criminally responsible for what he does?" Edna claimed she was worried about her sleepwalking uncle, Peter Kent.

Several nights later, a white-robed figure silently glided across the patio of the Kent home. The moonlight glinted on a deadly carving knife clutched in the sleepwalker's hand. Before dawn, a man lay stabbed to death. Later, the bloodstained knife appeared under Peter Kent's pillow.

The evidence was to pat for Perry Mason. He suspected the knife had been purposely planted. Was Peter Kent's pretty little niece, Edna, trying to frame her uncle?