DURHAM - The younger brother of one of the Eve Carson murder suspects was shot to death Saturday night at a party that left another teen dead and two others injured.

Shelton Henderson Jr., 19, had recently testified before a federal grand jury, which indicted his older brother Demario Atwater, 22, on fatal carjacking, armed carjacking and felony firearms charges.

Henderson's body was found outside the townhouse where the party took place. A second teen, Nathan Elmoore, 17, also died of gunshot wounds, police said.

Christopher Hunter, 16, and James Downey, 21, were treated for gunshot wounds that were not considered life-threatening.

Police arrested two teens Sunday in connection with the shooting, but neither suspect had been charged Monday with homicide.

Deamonte Tavaris Brooks, 18, has been charged with two counts of assault with a deadly weapon with intent to kill inflicting serious injury in connection with the shooting of Hunter and Downey, police said. Dylan Shaqaun Turner, 17, has been charged with possession of a firearm by a minor.

District Attorney Jim Woodall and Chapel Hill Police Chief Brian Curran said their cases against Atwater and Laurence Lovette, 17, the other suspect in Carson's death, do not hinge on the testimony of Henderson, who they confirmed is Atwater's brother. They also said he had limited knowledge of the case.