He's charged with two counts of murder and weapons offenses in the deaths of 30-year-old Luis Mesa and 27-year-old Daniel Torres.
The two Elizabeth men were shot early Saturday outside the El Buen Gusto bar in Elizabeth and pronounced dead at the scene.
Romankow said a motive for the shooting has not been determined, saying evidence and witness statements led authorities to Perez.
It was not known Sunday whether Perez had retained a lawyer.
