Hi there Pippy! Welcome!
![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
& Good luck on those finals!
I may be mistaken, but I believe that the portion of the letter in which he talks about the psychiatrist was in the section addressed "To Mom and Dad"
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“I have wanted to do this for over a year. I am not sad or see this as tragic. I feel a release. This is the only way I knew to attain harmony.
(…)
I am no longer interested in the world and know that it is not interested in me. When you stop growing you are dead. I stopped growing long ago. I never did develop into a real person and I cannot tolerate the false and empty existence I have created.
(…)
I feel I have acted very methodically and coolly in my action and my words. It is best if I cease to live, quietly, than risk that later I will break and shatter by violence or linger years under care. I implore you to see a psychiatrist in order that you might understand my death and my life. Ask thoroughly about what I was and you will see that it is not tragic that I am gone but more natural than if I continued.”
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I do not think that the full suicide note has ever been released, and there is no DNA available because the body has been ultimately lost.