'Angel of Death' dies naturally in prison

SAN QUENTIN, Calif. Diaz, 72, was sent to California's death row with 12 counts of first-degree murder with special circumstances.

The patients died in hospitals where Diaz was employed as a nurse.

Since 1978, when California reinstated capital punishment, 51 condemned inmates have died from natural causes.

As of August 11, 2010, there were 706 people on California's death row.

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