DeVante admits he's hiding from King, who wants DeVante to shoot Dalvin's killers. DeVante doesn't want to kill anyone. He asks Maverick how he escaped gang life.

Why is DeVante hiding in the store?

When Maverick and Starr arrive back at the store they find DeVante. It becomes clear that he is trying to hide from someone; he finally admits he is trying to hide from King because King wants him to “handle”—kill—the people who killed his brother Dalvin.

Who is DeVante hiding from?

DeVante is hiding from King in Mav's store and Mav decides to protect him. DeVante works in Mav's store and is taken to live with Uncle Carlos. It's DeVante who's beaten up by King (in the movie it's Seven), and he's with Seven, Starr and Chris at the protests and agrees to be a witness against King at the end.