A former Boston high school dean serving a 26-year sentence in state prison for shooting a student he had recruited to deal drugs has received an additional 18 years or more on a federal gang-related charge.

Prosecutors said that Shaun Harrison, 63, lived a double life, portraying himself as an anti-violence activist and mentor for troubled teens while hiding his own gang ties, and luring students into drugs and violence.

In 2022, Harrison pleaded guilty to a count of racketeering conspiracy, also referred to as a RICO conspiracy.

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Harrison is serving time after his 2018 conviction for attempting to kill a student who was selling marijuana in the high school at Harrison's direction, authorities said. The 17-year-old was shot in the back of the head after a dispute over declining drug sales, prosecutors said. The student survived but suffered partial face paralysis, permanent hearing loss and other injuries.

Massachusetts U.S. Attorney Rachael Rollins said Harrison exhibited what she described as an astonishing level of betrayal and dishonesty.

"As the academic dean at a Boston public high school he lured and manipulated teenagers into a criminal enterprise that specialized in street terrorism," Rollins said in a written statement after Harrison was sentenced Thursday in federal court. "Harrison was the architect of ruin for an entire generation of promising young lives."

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She said Harrison continued to associate with the Latin Kings gang while in state prison.

Federal prosecutors said last year that Harrison was one of dozens of defendants to plead guilty in a sprawling Latin Kings case stemming from an investigation dubbed "Operation Throne Down."

Last year a federal judge ordered Harrison to pay more than $10 million in damages to the former student he was convicted of trying to kill, but it’s unclear whether the victim will ever get any money from Harrison.

Harrison was hired by the Boston Public Schools in 2015 to serve as an academic dean at English High School, a public, magnet school. In that role, Harrison was to act as a mediator between teachers and students, contact families when students struggled and to work with at-risk students, officials said.

The Tennessee Titans will be bringing back a fan favorite during the 2023 NFL season, according to legendary quarterback Warren Moon. 

The Titans will dust off their throwback Houston Oilers uniforms for a game this season, Moon revealed Thursday on the "Up and Adams Show."

"I talked with the owner [Amy Adams Strunk] about it," Moon said. "She was waiting for the helmets to be approved. Now that you can wear the helmet, we’re wearing the whole uniform this year, and it could be against the Houston Texans.

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"We are not joking."

The Houston Oilers made the move to Tennessee in 1997, keeping the Oilers' nickname for the first two seasons before being renamed. 

The franchise formed in 1960 as a member of the American Football League before merging with the NFL in 1970. 

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The Titans can wear the old-school uniform due to a 2021 rule change by the NFL to allow teams to wear alternate helmets with throwback uniforms. 

The organization retained the rights to the Oilers' logo and colors after changing its name and last wore the throwbacks in 2009 to celebrate the AFL’s 50th anniversary. 

"I love it when teams pay homage to the history and legacy of the guys that paved the way for us all," former Tennessee wide receiver Kevin Dyson told Outkick. "So bringing back and wearing the ‘Luv ya Blue’ uniforms is the ultimate sign of respect for all of those that played for the franchise."

Moon was inducted into the Pro Football Hall of Fame in 2006 after 17 years in the NFL and spent the first 10 years of his career with the Oilers.