Quick rules summary: Ask any yes/no question, and I can only answer with one of these seven responses:
The Case - Easy
Wayne lies dead in the water, wearing a plastic raincoat.
The Mystery
Who killed Wayne, how, and why? How did his murderer get caught?
Was it Garth?
Is Wayne in a puddle on a street or sidewalk?
No.
EDIT: It feels so strange when you don't say Ronway.
No.
Is/Was Wayne a person?
Yes.
Is Wayne in a naturally-formed body of water?
Yes.
Is Wayne an adult?
Yes.
Was it raining when he died?
No.
Did Wayne drown?
Yes.
Was he held under water by the murderer?
No.
Did wayne drown of his own stupidity?
Define what you mean by "drown of his own stupidity."
Was he in the lake because of his own actions.