The question was asked: If someone for example is sick and must eat from a non-kosher animal. Must it be shechted (slaughtered) first like a kosher animal? I don't see any reason why it should, since the Torah and Chazal only gave the laws of kosher shechita for a kosher animal. However, perhaps there is a source that speaks this out explicitly.
(This is the best I can do to source this. If I would have had more ability to research this I wouldn't be asking the question looking for a source.)