Sunil Tripathi committed suicide, and while missing was named as one of the Boston bombers by a bunch of Reddit detectives leading to harrassment of his family, but I don't think the suicide was a result of being misidentified.

I think that's where the GP's mistake originated, though, since there was a public misidentification of someone who committed suicide.

https://www.wikiwand.com/en/Suicide_of_Sunil_Tripathi