Many of Johnson's classmates at Enloe High School in Raleigh say they are still shocked by his death and have no idea what could have lead to the shooting.
"He doesn't have problems with nobody, so I don't know why that would give them a reason to do something like that," Johnson's friend Tyjuan Day said.
Friends and loved ones say they are still trying to cope and make sense of the loss.
'We're never gonna see him again, that's something hurtful to me, for all of us, especially for his mom," Johnson's friend Trominique Ruffin said.
"We just don't know; it's just unexpected," his cousin Camille said. "I'm still waiting for him to come home from Drivers Ed and talk to him and me help him out and just be family."
Since Johnson's death, friends and family have turned his home into a make-shift memorial to remember the teen - balloons, stuffed animals and flowers fill the front yard.
"A class clown, he was popular, he had a lot of friends and he knew a lot of people," Camille said. "He had almost 3,000 friends on Facebook."
Meanwhile, authorities have arrested four men in connection with Johnson's death.
Police have charged 17-year-old Solister Lester, 18-year-old Alexander Leon Walton, 19-year-old Rodney Nigee Pledge Taylor and 29-year-old Floyd Clifton Creecy Jr., with murder.
They haven't released a motive, but say Johnson knew one of the four suspects.