two links first: from the Times,A tragic death, but part of me cannot help but admire it and from the Guardian which refers back to thge first piece. Why suicide? Only one person knows i'm just going to quote some things at random from them. but, both articles are in reference to Dr. Kelly's suicide.

"The clinical psychologist Dr Dorothy Rowe .... makes a fascinating point when she talks about the psychology of suicide. And it is this: only good people kill themselves. What she means by this is that only people to whom it is important to see themselves as good see their very identities as coming under threat when circumstances conspire to make them appear “bad” or failures. Perhaps it is true that all of us seek to cast ourselves as good people — but it is people who rigorously, perhaps even pathologically, take responsibility for their own lives that are most at risk from suicide.
They do not have the politician’s trick of blaming others for misfortunes. They give primacy to their own roles in the outcome of any circumstance. They are good because they try to stay true to themselves — at almost any cost. They are reluctant, above all, to blame others for their misfortunes. Their anger, when it comes, is terrible, but it is directed, finally, against themselves.
So let me say that one other thing I know about suicide is that it is, ultimately, a mystery that defies analysis. I do not know the answer. But I do believe that suicide is always concerned with a crisis of identity.
Dorothy Rowe makes the point that the suicidal personality will kill himself as a body rather than die as a self. Some people are so determined to be the person that they imagine themselves to be that a set of circumstances that exposes a gap between that version of themselves and reality becomes unbearable."

"Suicide is an act of enormous violence, both against the self and against family and friends. The suffering that it causes families is huge, and usually unplanned. Psychoanalyst friends of mine say that suicide is almost always carried out in a moment of psychosis, arising out of a severe depression. The creation of such a moment must be far more complex and individual than can be encompassed in the crude notion of being "driven to it". Why, after all, might one person buckle under the music-hall ruderies of an Andrew Mackinlay, while another will enjoy telling the hapless select committee member where he can shove his Essex-boy bluntness?"
to repeat.... "Quoting the psychologist Dorothy Rowe, Lott pointed out that some suicides have an idealised view of themselves which, when it is threatened, they protect by destroying themselves. In other words, the man - the rather pedantic and perfectionist man - who came before the select committee might (and "might" is an important word here) have been particularly vulnerable to a sense that he had failed his own exceptionally high standards."