Criminal trials for murder and other serious crimes would be conducted in what court system

Criminal trials for charges of murder and other serious crimes would be conducted in the state court system unless the charges involved multiple states, non-citizen immigrants, or a foreign ambassador state court system unless the investigation of the case involved the highest executive agencies in the state federal court system unless the investigation of the case required a majority of state resources federal court system unless the charges were limited to actions that violated state laws.
(Hope it helps my friend! ^_^) 

What the question i don't get it do u mean what she needs to do to auctually become one