A High Desert State Prison inmate who had also been sentenced to 18 months in federal prison for mailing letters that threatened a federal judge and sparked an anthrax scare has died, the Nevada Department of Corrections said.

Hadari Stallworth, 30, died Saturday at Centennial Hills Hospital in Las Vegas, according to a news release from the department.

A cause of death was not listed, and autopsy was requested, the department said.

Stallworth was serving a sentence of 9 to 22 years at High Desert for kidnapping, robbery, battery by a prisoner with a deadly weapon and prisoner with a weapon, according to the news release. The prison, in Indian Springs, is about 40 miles northwest of downtown Las Vegas.

While Stallworth was serving his state sentence, he sent two letters to the Lloyd D.

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