A local reverend and Boston English High School employee, accused of luring a teenage student of the school with drugs and girls to a street in Roxbury before shooting him “execution-style” in the back of the head Tuesday night, was arraigned this afternoon on an assault with intent to murder charge.

Shaun O. Harrison, 55, of Roxbury, pleaded not guilty this afternoon in Roxbury District Court to charges of armed assault with intent to murder, aggravated assault and battery with a dangerous weapon, unlawful possession of a firearm, unlawful possession of ammunition, carrying a loaded firearm, discharging a firearm within 500 feet of a dwelling, and possession of a firearm in the commission of a felony. Judge David Poole ordered him held on $250,000 cash bail.

Harrison is a prominent Dorchester youth minister and former head of Operation Project GO, a youth anti-crime outreach program aimed at keeping local kids out of gangs.

The unidentified 17-year-old student told police he had been selling marijuana for Harrison for several months and had been promised girls and weed before Harrison shot him “execution-style” on Magazine Street at 7:15 p.m., prosecutors said. The shooting was captured on a nearby surveillance camera, a Suffolk County District Attorney spokeswoman said.

The victim was transported to Boston Medical Center and is expected to survive his injuries, according to authorities.

Harrison, who prosecutors said leads substance abuse and anger management programs at the Jamaica Plain high school, allegedly has a mural of Latin King members in his home and shared a matching tattoo with two other men arraigned in connection with the shooting.

When interviewed by police, a neighbor stated “I’ve alerted the police and city hall on many occasions about the constant drug activity coming from” Harrison’s apartment, according to court documents.

Harrison has been fired as a result of the investigation, according to a statement released by interim Boston Public Schools Superintendent John McDonough.

“Nothing is more important than the safety and well-being of our students,” McDonough wrote. “English High School is filled with committed and caring educators who go above and beyond for their students every day. The school community is strong and its students and teachers have my unwavering support … The employee in question is being terminated immediately.”

Harrison was formerly an associate minister at Charles Street African Methodist Episcopal Church in Roxbury and ran for a Boston City Council seat in 2009.

Oscar Pena, 19, of Dorchester; Wilson Peguero, 23, of Dorchester; and Dante Lara, 24, of Cambridge, were also arraigned in connection with the incident.

Harrison is scheduled to return to court April 6 for a pretrial hearing.

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