Prosecutors believe the gun used in the shooting is a .22-caliber revolver.
Police Chief Danny Ford has insisted the shooting was not gang related, although the chief has described the defendants as gang “wannabes.”
However, in some of the requests for Facebook records, the district attorney's investigator told the judge he “has determined that these social media outlets have been a source and avenue of posting of criminal-affiliated activities by posing and showing associations with gangs and firearms that are commonly associated with gang-affiliated activities.”
In Facebook photos, Luna and Edwards appear to flash gang signs.
Edwards' Facebook page also had photos posted in May of stacks of hundred dollar bills, a handgun and Edwards holding a rifle.
Investigators also have collected as evidence cellphone text messages and Luna's Twitter account, the court records show.
Luna has a history of fighting, did poorly in school, dropped out and talked about joining the Army, The New York Times reported Sept. 30.
“He would say to me that there ain't nothing to do here. Nothing,” his mother, Jennifer Luna, told The Times.
Luna has denied involvement in the shooting.