Gardner Erle Stanley. The Case of the Counterfeit Eye

"Peter Brunold has a bloodshot glass eye to use the "morning after". It is distinctive, closely identified with him, and thus quite a handicap when a corpse is found clutching a bloodshot glass eye. Later, another corpse is found, with another bloodshot glass eye in hand. Perry Mason is in almost as much jeopardy as his client: the lawyer's fingerprints have been found on one of the alleged murder weapons."