David Sanguine

So new series new characters. This is my a death on murder street series (adoms). I'm going to set the scene. A nice night and then dead body (describe the state of the body in any way you want). You are a new detective in town and well you have to find who is deranged enough to have done it. David is your first suspect. He is the underrated genius. Always has his head in books but had a grudge against the victim. Is he the killer?