Where does the Catholic Church stand on an individual that takes his own life?
Catechism of the Catholic Church:
2282 …Grave psychological disturbances, anguish, or grave fear of hardship, suffering, or torture can diminish the responsibility of the one committing suicide.
2283 We should not despair of the eternal salvation of persons who have taken their own lives. By ways known to him alone, God can provide the opportunity for salutary repentance. The Church prays for persons who have taken their own lives.
To be guilty of a mortal sin an individual must know what he is choosing and freely choose it. Individuals who commit suicide are almost always suffering from some kind of psychological or emotional condition that overwhelms them and impairs their ability to fully understand and freely choose their actions.