FORT WAYNE, Ind. (WANE) - A teenager was sentenced Tuesday for his role in the beating of a boy who suffered “irreversible” brain damage, all because of a missing vape cartridge. A judge in Allen Superior Court sentenced Quintin Mansfield to nine years in prison. He was given credit for 201 days already spent in jail, court documents show. Mansfield, now 19, was first charged in February after what court documents described as a beating over a THC vape cartridge. Mansfield told police the boy and three others were at his house and at some point a cartridge went missing. Mansfield thought the boy took it, and investigators wrote in court documents he admitted to exchanging words with the boy but Mansfield “blacked out” when the beating began. He said in court documents he may have hit the victim five or six times. A doctor told police the boy had a traumatic brain injury with “irreversible damage,” according to court documents. Mansfield pleaded guilty to aggravated battery in August without making any sort of plea deal with prosecutors. A no-contact order was also issued at Mansfield's sentencing.