The son of an alleged victim of Brooklyn serial killing suspect Salvatore Perrone told The Post he wishes he had a “minute alone” with the so-called “Son of Sal.”

While on the stand in Brooklyn Supreme Court, Mourad Gebeli, 36, broke down describing the last time he saw his dad, Mohamed, on July 6, 2012, at the Bay Ridge shop, where he would later be shot.

“He’s a piece of s–t. He’s horrible,” Gebeli told The Post after his testimony this week. “I wish I could get my hands on him.”

The trial of Perrone — who allegedly killed three Middle Eastern shop keepers in 2012 — is scheduled to resume Friday.