Hello, So, in the short story I'm writing, the main character is the sole survivor of a deadly Great Lakes shipwreck. I am just curious as to how the investigation of the incident would be carried out, particularly regarding questioning of the survivor and getting eyewitness testimonies from him. Would multiple questionings be performed, or just one? Would he have to answer to the Coast Guard and the police or just the Coast Guard? I haven't really found any good resources on this topic, so I'm hoping someone here could be of help. This takes place in the Late Modern Era (sometime in the 1970s, to be exact).