Can a chemical dependency treatment center be held accountable for a suicide?

My father died by suicide this year after a 3-day detox session at a chemical dependency center. My father requested to be admitted into their 30-day treatment recovery program, and was denied. He was told that there were limited beds available for his stay. 15 days later, my father shot himself in the head because of the mental anguish of trying to recover from a percoset addition due to chronic back pain.