Jail death from excess water drinking
The death of Ruben Nunez in San Diego’s Central Jail has raised questions about whether staff failed to properly monitor him. He suffered from a psychiatric condition that causes unrelenting thirst. Five days after he arrived, he was dead. Ref. Source 3r.
Very strange psychotic disorder. I can't say the police are blameless. When he was detained did he indicate anything or was his behavior irrational? At that point a professional should have been brought in to determine this.