Union County Prosecutor Theodore Romankow announced on Friday that officials now believe robbery was the motive in the July 17 attack on Abelino Mazariego in Summit. The 47-year-old father of four died days later.
Three teenagers were previously charged with felony murder. Two are adults and prosecutors are seeking to try the third as an adult.
Two more juveniles, who police have declined to name because of their ages, are charged with conspiracy and robbery-related counts for allegedly acting as lookouts.
Authorities say a fourth teen, who is not charged, videotaped the attack.
The prosecutor says there were 14 people there that night, but only three attacked Mazariego.
"We don't believe he knew that there was going to be a robbery. It's as simple as that," said the Prosecutor.
At Mazariego's home there was no answer today.
His son sometimes works at a cafe around the corner from where he was killed.
They are collecting money so the family can send his father's body back to El Salvador.
Signs of compassion surround a memorial and words of comfort for a community not used to this kind of violence.
(The Associated Press contributed to this report)