Craig Arno is charged with the murder of Martin Caballero of North Bergen in May 2010.
Arno's ex-girlfriend, Jessica Kisby, testified she and Arno carjacked Caballero and stole money using his ATM card. She says Arno fatally stabbed him and dumped his body in the woods before torching the man's vehicle.
Arno said he had nothing to do with the killing, but did set fire to Caballero's SUV.
Kisby pleaded guilty to murder and agreed to testify against Arno in return for being eligible for parole after 30 years.
