What is the difference in evil and mental illness?

Say someone killed someone, how do you know it was mental illness or just evil?

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Those who are mentally ill do not know the difference between right and wrong; good or bad. Therefore are mentally incapable of choosing their behavior. Those who are evil do know, and choose to do evil anyways.

sogdianrock · 61-69, M

hi AnarchoMetalchic
Killing people is evil but to kill people you must be mad though.
Best wishes
:)

AnarchoMetalchic · 41-45

Not necessarily. Some know that murder is wrong, yet choose to do it anyways.