I am also a suicidologist.
I wanted to correct some simple misinformation.
Suicide is not preventable via lockup or supervision. Human ingenuity beats supervision 100% of the time.
* A review of 76 inpatient suicides showed that 50% died on 1:1 or q15 checks.
* The highest rate of suicide in institutions occurs when people are on suicide watch in prisons
We don't know enough details yet. However, suicide can be accomplished quickly with someone turning their head or looking the other way. Human beings are human beings. Even if a guard was watching, suicide is still possible.