Once people decide to kill themselves, they will carry out their plan. They gamble with death, leaving it to others to save them.
Suicide happens without warning.
People commit suicide because they're depressed. Most suicidal people leave notes explaining their action. Once a person is suicidal, he or she is that way forever. Improvement after a suicidal crisis means the risk is over. Suicidal behavior is not a normal response to the stresses most people experience.