Major Rathbone's accomodation in Hannover

[My Name Is Kate]

Did Major Rathbone have to stand trial for what he did, or was he judged mentally incompetent, and sent to an asylum?

I'm wondering if anyone ever tried to explain to him what he did, for instance, when he was calling out to Clara after he had just finished murdering her (it boggles my mind...) Did he ever have a glimpse of insight into what he did, or why he did it? I don't suppose...