An Earful Of Convoy/cocktail

We're solving a mystery, the mystery of the murder of Douglas Coughlin! The clues are everywhere! Can someone commit suicide by slashing their own throat? (we consult Quora.) Who wrote the "suicide" letter? (We conduct advanced handwriting analyses.) Also featuring additional investigations into etymology of penthouse and other compound words, the coroner scene, the corner scene, blood temperature measurement techniques, and more! Additionally: an update on the Pittsburgh Orchestra, plus a very special edition of the famous theme song.