Generally police officers are not held responsible for suspects dying from a heart attack during arrest. Either while running away from the police officer, or while resisting arrest.

You could use the same argument against vaccines and say because someone died shortly after receiving a vaccine that vaccines kill people. It’s the same with this police interaction, given the amount of police interactions and often the nature of the interactions, drug related, it is a statistical certainty that a death with occur during the interaction. Coincidence does happen, it isn’t a myth. Did his interaction trigger anxiety in the individual that made issues more likely, of course, but that is the risk you have to deal with when you are committing crimes and doing drugs.