The family needs to hire a Medical Malpractice attorney to review all the records and advise whether or not he/she feels there's a claim worth pursuing. Did the deceased leave behind a spouse or dependent children will be a consideration for the attorney. This would be a civil claim. If you believe the actions were done intentionally which would make them criminal than I would call the local authorities.
You are obviously, and appropriately very upset. However, your anger may be clouding your judgment. People do get infections in the hospital all the time. It may or may not be the fault of the health care providers. Some such infections are very serious indeed. There are few drugs - sometimes no drugs- that can treat them, and the drugs may have unavoidable side effects. It's not like using a cannon to shoot a fly, it's more like using an elephant gun to kill an elephant. At the end of the day, it's still the patient's choice what treatment to have. If the patient dies, it's the family's choice to consider any possible course of legal action. Calling up a lawyer now while the patient is in a health crisis is not going to help. Calling the District Atttorney right now is still less likely to help, in my opinion.
Any opinions stated in response to Avvo questions are based upon the facts stated in the question. Responses to Avvo questions are for general information purposes only, and should not be construed or relied upon as legal advice.
Hospital born infections are common. They represent a great threat to elderly and infirm patients.
However, this does mean you have a case. To know whether there has been a deviation causing damages and death, you need to consult with a local malpractice lawyer. Use the Find A Lawyer Tab.