David Daniel Dieringer, III, Mailing a Threatening Communication, Arkansas 2021

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Table of Contents

Threats to Federal Courthouse and White House Land Arkansas Man in Prison

FORT SMITH, AR – In a disturbing display of violence, David Daniel Dieringer, III, 28, of Fort Smith, Arkansas, was sentenced to 36 months in prison followed by three years of supervised release on one count of Mailing a Threatening Communication. Judge P.K. Holmes III presided over the sentencing hearing in the United States District Court in Fort Smith.

According to court documents, on June 25, 2021, the Sebastian County District Court received a letter from Dieringer threatening to blow up the Fayetteville Federal Courthouse and the White House. The letter stated that if the recipient did not communicate the threat, they would be killed. The return address was an address used by the Sebastian County Adult Detention Center where Dieringer was an inmate at the time.

Dieringer was interviewed and admitted to sending the letter, stating that if given the opportunity, he would carry out bombings of both locations using a pressure cooker bomb. He also described how to assemble such a device. On July 11, 2021, Dieringer placed a letter addressed to the White House in the Sebastian County Detention Center inmate mail system. The letter addressed President Joe Biden and stated, "When I get out of federal prison, I’m going to blow up the White House." Dieringer was later interviewed and admitted to writing the second letter as well.

The investigation was led by the Sebastian County Sheriff’s Office, the United States Postal Service, the United States Marshals Service, and the United States Secret Service. Assistant U.S. Attorney Aaron Jennen prosecuted the case for the United States.

U.S. Attorney David Clay Fowlkes of the Western District of Arkansas made the announcement. Dieringer’s actions demonstrate a clear and present danger to public safety, and his sentence reflects the severity of his crimes.

Dieringer will serve his 36-month sentence followed by three years of supervised release. His crimes highlight the importance of vigilance and cooperation between law enforcement agencies in preventing and investigating threats to public safety.

The case serves as a reminder that threats of violence will not be tolerated and will be prosecuted to the fullest extent of the law.