What went wrong in Ward 86? The hours and minutes leading up to Alberto Rangel's killing.

""without hesitation.""

""close enough" to "rapidly ... intervene within seconds.""

"The deputy, the union's statement read, prevented a "mass-casualty stabbing.""

""It was kind of psychotic talk," she recalled."

Alberto Rangel, a social worker at Ward 86 outpatient HIV/AIDS clinic, was stabbed repeatedly and killed by a patient who had earlier threatened clinic staff. The patient, Wilfredo Tortolero Arriechi, behaved erratically at City Clinic, demanding to see a doctor and making psychotic-sounding threats. Staff reported abusive behavior and planned to ban the patient from the ward after prior threats. Sheriff and union statements described a deputy intervening quickly and averting further violence, but multiple eyewitnesses on the ward disputed those accounts and questioned why no one stopped the attacker. A timeline was compiled from eyewitness accounts.

Read at Mission Local