Suicide by gun is the number one cause of people killed by guns....
By definition killing yourself by suicide is a mental disorder...
Yup. Folks who commit suicide are usually intent on killing themselves regardless of the method. I knew 4 personally who did themselves in and saw another one on cctv at work. One 1911, one 12 guage, one CO poising from closed garage car running, one OD and one jumper.