Question

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

Answer 1

I think it's the last one.