Four killed and dozens wounded after nearly 100 rounds fired at Alabama birthday party

Six shooters opened fire at a Sweet Sixteen birthday party in Alabama, killing four people and injuring dozens of others.
Nearly 100 rounds from at least 7 handguns were fired at the party, with one weapon altered for rapid firing.
Three adults and three juveniles have been charged with reckless murder in the massacre.
The motive for the shooting remains unknown, though the defendants were friends and relatives of partygoers who traveled from across the state to attend the party uninvited.
Evidence at the chaotic crime scene links shell casings to the defendants, some of whom confessed to firing into the crowd of 50 to 60 people.