John W. Rainwater was 95 when he died in the early morning of April 11, 1981, at Community Hospital of the Valleys in Perris, California. He was seriously ill with congestive heart failure and had been described as alert and stable shortly before a sudden crisis in which he developed seizures, then cardiac and respiratory arrest, and was pronounced dead about 4:45 a.m.

Medical investigators later focused on the timing of events that night. A nurse on duty, Robert Rubane Diaz, had been watching Rainwater’s heart monitor and said he intended to give atropine; prosecution testimony at trial emphasized prolonged QRS changes on Rainwater’s rhythm strips and unusually high lidocaine concentrations in tissue samples, conclusions several experts interpreted as consistent with a massive lidocaine overdose. Defense experts countered that Rainwater’s extreme age and severe heart failure could explain the findings or impaired lidocaine metabolism.

Rainwater’s death became part of a larger pattern of violent seizures and arrests among patients treated during Diaz’s night shifts; investigators alleged Diaz had access to intravenous lines and later recovered lidocaine linked to the case, including a preloaded syringe found months later near a former ICU bed. The killing was prosecuted as one of multiple homicides tied to those events.

If anyone knew John Rainwater, his condition at the hospital, or observed unusual activity in the Perris ICU that spring of 1981, please share what is known with investigators.