He was said to have left a suicide note, blaming his decision on ill health.

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He had left a suicide note and had been battling depression since 2003.

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News reports indicate that he left a suicide note in his room, and the New York Daily News mined his Facebook page for clues.

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Dimitris Christoulas shot himself in the head and left a suicide note that said young people would one day rise up against the government, Athens News reported.

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"This tragic event has to encourage those who accuse and comment without proper judgment to exercise responsibility, " ALP said, adding that the doctor had left a suicide note.

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Police probing Finland's first known school shooting said Thursday that a picture was emerging of the gunman as a lonely, antisocial 18-year-old who acted alone and left a suicide note saying good-bye to his family, but that his motive was unclear.

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Dave Duerson, a former NFL safety who shot himself in a similar manner to Seau in 2011, even left in his suicide note a request that his brain be studied for CTE.

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