Deep philosophical question/thought experiment?

Suppose a person commits a murder, and in the process of trying to escape the scene suffers a head injury and goes into a coma.

While in this coma, their brain is damaged and altered in such a way that they have amnesia and their personality has drastically changed.

Is the person that wakes up from that coma the same person/the same identity as the person who committed the murder? And are they morally culpable for that murder even though they dont remember it and can't believe they would have done such a thing?

Just asking morally and leaving legality out of the equation unless you just want to expound on the subject.

Deep philosophical question/thought experiment?
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