Wrong-oh, JNS. The suspicion priority is first a homicide, second an accident, third a suicide, last natural causes. Some death certificates actually say "undetermined" as a cause. Does that mean they are not really dead?
Dun, dun, dun....
Suspicion is irrelevant.
The ME's office must determine that a homicide has occurred before a prosecutor is supposed to charge someone with unlawful homicide.