Thirty-one-year-old Demar Edwards was arraigned Monday on three counts of homicide. Police say he was one of four people who stormed into an Easton apartment in November 2007 and killed Alphe Rene, Chanel Amour and Aleah Hamlin.
Police say Rene was targeted in retaliation for earlier killings in New Jersey.
One suspect has been sentenced to life in prison for the slayings and a second pleaded guilty to conspiracy. A third is awaiting trial.
Edwards was arrested September 1 in Irvington, N.J. and waived extradition a week later.
It was not clear if Edwards had an attorney.