Trial and Error
"Shy and retiring Lawrence Todhunter decides to make one final contribution to humanity before he is claimed by a fatal heart disease--he will eliminate the most obnoxious person he can find. He commits the murder, but then an innocent man is arrested for the crime. Horrified by this unexpected outcome, Todhunter is forced to turn detective to prove to the authorities that they have got the wrong man."--Page 4 of cover.