A Douglasville man had time tacked on to his sentence after he ran a drug operation from inside a Georgia prison and threatened to kill a Cobb County deputy.

Alejandra Javier Chaves, 42, pleaded guilty to the accusations Monday. Chaves was sentenced to serve 18 years in prison and won’t be eligible for parole for at least 10 years.

State prison records for Chaves date back to a burglary conviction in 1993.

A district attorney’s office news release said that Chaves ran the drug operation using a cellphone that was smuggled into the prison in March 2014.

Chaves figured out the client was actually a cop when two of his delivery people got arrested.

In his reaction, he “repeatedly threatened to kill the deputy and her family,” prosecutors said.

“We must protect those who protect us. We will not allow anyone, especially prison inmates, to send poison onto our streets and threaten the lives of our officers or their families,” said prosecutor Jason Saliba.

Chaves and five others were indicted for these charges in June 2015. One was sentenced to 10 years in prison and 15 years probation, according to the district attorney's office. The others await sentences.

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