Death by Suicide
My wonderful late husband volunteered for many years at a nonprofit specifically created to support grieving children. He taught me that they never said a person "committed" suicide. Suicide is complicated, but "committing suicide" sounds like a crime, and survivors do not deserve that stigma.
They died by suicide, killed themselves, or took their own life, often in a moment of biochemical imbalance.
A word choice can make a difference.