The Killing of Edward Walsham

Edward Walsham committed suicide, but tried to make his death appear as a murder. There's very little glass on the floor of the study indicating it was broken from the inside. Of course, an elegant knife is going to be owned by a rich aristocrat. But why detective? Kreis-Veller Walsham. You stride over to Edward Walsham's desk. This desk is littered with alcohol and pills. Notice that the murder weapon is far too elegant to be the weapon of a common burglar. Meanwhile, obviously he did it himself, didn't he? The wound is also self-inflicted.