GREENVILLE, S.C. -- Greenville's police chief said that though the death of a man who was shocked with a Taser was ruled a homicide, it is not considered criminal.[LINK]
It's not difficult to accept that a homicide might sometimes be lawful, as opposed to criminal. (But it might be best if such decisions were made by way of a public inquiry - not just the opinion of a coroner, a police chief, or a local DA.)
An autopsy report stated that Andrew Torres, who police shocked with Tasers, died from cardiac arrhythmia caused by an enlarged heart and that the physical exertion of the altercation with officers may have contributed to his death.
So it's a homicide ('by the hand of another', i.e. EXTERNAL), but was caused by an enlarged heart (i.e. an INTERNAL condition).