manslaughter also breaks down into 2 catergories, voluntary and involuntary, involuntary is usually for circumstames like accidents. The voluntary aspect encompasses, gross negligence manslaughter (usually medical cases) and unlawful act manslaughter which is basically an unlawful act resulting in a death. Aspects involved also include intention, and causation in that you need to show that the (dealer in this case) had caused the death. If the links can made unlawful act manslaughter may work