A Chesapeake Beach teenager was sentenced to serve 18 months in jail Monday following his guilty plea to conspiracy to commit robbery for a February drug-related incident that resulted in a single-vehicle crash.

Charged as an adult, Brandon Lee Duncan, 17, pleaded guilty last week to conspiracy to commit robbery in a plea agreement with state prosecutors to drop his other charges, which included single counts of armed robbery, second-degree assault and theft valued between $100 to $1,500, online records show.

Circuit Judge Mark Chandlee sentenced Duncan to 10 years in jail and suspended all but 18 months. Duncan has been incarcerated since March and has a credit of 138 days. He will serve the rest of his 18-month jail time at the Calvert County Detention Center. After his release, he will start his five-year supervised probation.

In court Monday, Duncan’s lawyer Melissa Miller told the judge that Duncan had worked and earned his GED certificate while in jail. Through his father, Miller said he has a job with a construction company waiting for him once he turns 18 in late August. Also, his baby is due in October.

“I’m ready to change,” Duncan told the judge, noting he is going to do things for the better, not for the worse, when he gets out of jail.

When Chandlee further asked him what he wants to do with his life, Duncan responded that he plans to go to college to study criminal justice and become a lawyer.

“There’s more work to be done for you to be productive,” Chandlee told Duncan.

The judge said he gave Duncan a sentence he could “build on to be successful.” Before considering a work release, Chandlee ordered Duncan to complete a mental health treatment program for outpatient services.

As previously reported in The Calvert Recorder, Duncan and three other teenagers allegedly robbed a juvenile in Huntingtown on Feb. 26 during a $110 marijuana transaction.

After receiving no payment for the transaction, the teen victim told police he grabbed onto the inside door handle of a 2005 Ford Escape and was reportedly dragged while being punched in the face. He let go before the car collided into the tree, police reported.

Police later learned there were four people inside the car at the time of the crash. Duncan allegedly pointed a pellet gun at the victim, and when the vehicle began to drive off, the victim grabbed the steering wheel, which caused the vehicle to go off the road, two witnesses sitting in the back seat of the SUV during the incident told law enforcement.

In a March interview with police, Duncan said he had the pellet gun but denied pointing it at the victim.

Twitter: @CalRecDANDAN

Twitter: @CalRecDANDAN