DJ Megatron recently made a name for himself appearing on the BET program "106 and Park."
McGriff had been heading to the deli and was just a block from home when he was shot. He had three children and recently got engaged to the mother of his youngest.
As friends brought flowers and lit candles, they described McGriff as a humble man.
"He was just Corey," one friend said. "He wasn't Megatron. What was like he was growing up. Always smiling, laughing. It's sad."
As DJ Megatron, McGriff also showcased his skills on New York's HOT97.
McGriff hosted the station's "What's Good" segment and has appeared in movies including 2005's "State Property 2," starring rappers Beanie Sigel and N.O.R.E., formerly Noreaga.
"I listened to his show on HOT97. It's a loss. It's a loss," neighbor Kesha McCremon said.
McGriff was shot in the stomach around 2 a.m.
"Everybody's hurt. We lost a good man. A good man. Nothing bad to say about him," another friend said.
Friends and neighbors say despite McGriff's rise to fame, his family always came first.
The devoted father worked to clean up the streets, hoping to leave a better place for his children to grow up.
"He was heading in the right direction, but now this," neighbor Tyrone Mathis said.
"We were working on stopping the violence," community activist Marquette Elliott said. "He won't get to work with us because of gun violence. It's heartbreaking."
So far, there are no arrests.