In God's hands

Yesterday I got a sad news. A lady, who has helped one of our missions in Asia, has committed suicide.
How can this be explained? I don't know the lady personally, but from conversations with someone who has known her and closely worked with her, plus the many projects she had for this Asian country, I wonder if this news could be true.
How can a person so enthused with bettering the lives of others take her own life?
I do not have any answer. And difficult as it is, I have learned that in life, our questions do not always have answers, so that we just have to live in peace with the questions.
The more correct ones might ask, so where is she now? Is she in hell, after all she committed suicide?
I do not know. I just know that God is greater than our limited minds. He knows the depths of a person, and as I always say, thank God there is a God.
As a postcript I heard that this lady had a sad married life. Her husband died in an accident. She was childless. It seems her sad and tragic life led her to depression.
However, I know that we cannot simplistically reduce these different experiences in order to arrive at a conclusion and pretend to understand and analyze her life. I am not here to analyze. I just want to know what God is telling me through this event.
From my own experience, I can say that it may happen that a person so bubbling with life would, after a series of experiences, question life's sense, its goodness, its fairness, the sense of going on.
I am sure that she is in God's hands. God knows the human person's inner struggles, the desire to crawl out from the pit, the effort to get up each day. If only for that, God grants us peace.