What kind of homicide investigation is this, anyway? It’s perfectly understandable when public officials closely guard information in a sensitive, ongoing case. However, certain aspects of the Jessica Chambers murder mystery in rural Courtland, Mississippi point to a shocking combination of incompetence, indifference, frustrating evasiveness, and plain old C.Y.A. lying by those in charge. It’s been almost a month since Jessica’s sudden and suspiciously gruesome death, yet despite an array of very shady characters and circumstances, no arrests have been made. District Attorney John Champion says they are expectantly awaiting results of forensic lab tests and subpoenas, while they go...