The 89th and final person was sentenced Thursday a years-long prosecution of members of white supremacist gangs including the Aryan Brotherhood of Texas, officials announced.

Jeramy Weatherall, 29, of Dallas was sentenced to 20 years in federal prison. He pleaded guilty in March to one count of possession of methamphetamine with the intent to distribute.

The investigation targeted white supremacists with long and violent criminal histories who were selling drugs around North Texas, U.S. Attorney John R. Parker said.

The defendants were members of gangs including the Aryan Brotherhood of Texas, Aryan Circle, Irish Mob, Dirty White Boys, White Knights and Peckerwood.

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Of the 91 charged in the investigation, 89 were convicted. One remains at large and is thought to be in Mexico, and another died before the trial began, officials said.

They were sentenced to more than 1,070 combined years in federal prison.

Among those convicted is 36-year-old Casey Rose of Mesquite. Rose got life in prison in 2015 on conspiracy, drug trafficking and firearm charges. Several high-ranking members of the organizations were also convicted.

Together the 89 people had been previously convicted of 736 crimes, including 234 drug-related crimes, 76 violent crimes, seven sex or child abuse offenses and one murder. Only six had no prior convictions, officials said.

They were also tied to 956 kilograms of methamphetamine worth just less than $10 million and 88 weapons.

"The Aryan Brotherhood of Texas and the Aryan Circle have essentially been decimated in North Texas," Parker said in a written statement. He also thanked the Texas Department of Public Safety and the Dallas Police Department for their work on the case.

The Garland, Mesquite, Sherman, Denison and Sulphur Springs police departments, as well as the Collin County Sheriff's Office and U.S. Immigration and Custom's Enforcement assisted.