If the evidence is destroyed, by cremating the body without an autopsy, and without medical studies that could answer the question (such as a CT scan of the neck), it will be impossible to answer the question.
The state is supposed to be obligated to investigate such allegations, not to collude in covering up evidence. Doctors are required by law to report suspicions of abuse.
Standing between a mother and a starving daughter, not permitting her to place an ice cube in the daughter’s mouth, and forbidding attempts to spoon feed the patient (many testify that it was possible) strike me as prima facie evidence of current abuse—by both husband and legal system. Others say he is merely carrying out her wishes. They have had plenty of ink.
If you were starving your cat, you’d probably be criminally charged.
Nobody denies that Mr. Schiavo is cohabiting with another woman while still married. Maybe you think that is perfectly okay, and that it does no damage to his credibility, but that is the situation, and others also have the right to their opinion about it.
If you’d also like to contest the painful nature of death by thirst, why don’t you try abstaining from food and fluids for a few days. It won’t hurt you. But I suspect you don’t need to try the experiment to know the outcome.