A jury found one teen guilty and another not guilty on Thursday in the April 20, 2013, death of De'Bron Harrison.
Brittany Irby, 18, and Elijah Wilson, 19, are charged with assault and battery, along with kidnapping.
Irby was found not guilty of the charges. Wilson was found guilty by the jury and sentenced to 40 years in prison.
Closing arguments began at 9:30 a.m. at the Greenville County Courthouse. After closing statements were made, the case was then handed over to the jury.
Greenville police said the suspect was part of a mob, which began attacking Harrison as he was trying to break up a fight at a birthday party held at the West End Community Center on Vardry Street.
Harrison, 20, was from Columbia, and was visiting the area to attend the birthday party, his family said.
In total, Greenville police charged 18 individuals, including 6 adults and 11 juveniles in the death.
A spokesperson for the solicitor's office said one of them, Jeffrey Jones pleaded guilty to obstruction of justice in court Monday and was sentenced to 399 days in jail, which is the amount of time he has already served.
Antonio Wakefield, 17, pleaded guilty to both charges at an earlier hearing, according to Johnathan Bragg, a spokesman for the Greenville Police Department.
Another man charged, is set to begin his trial later this Summer.
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