Belleview police said Christopher Leroy Broad Jr., 16, died after he was hit by a bullet while taking turns with Joshua Vining, 17, to shoot at each other while wearing the armored vest on April 3.
Police arrested Vining on Thursday on a charge of aggravated manslaughter of a child with a firearm.
Investigators said Colton Whitler, 17, who was initially interviewed as a witness to the shooting, misled officials with inaccurate information about what took place and who shot Broad Jr.Whitler was also arrested Thursday on a charge of providing false information to law enforcement.