A garment salesman accused of systematically shooting three shopkeepers – two of the Jewish – to death in their Brooklyn clothing stores will undergo a mental exam.

The judge ordered the exam after Salvatore Perrone repeatedly interrupted his arraignment on Wednesday.

Perrone was indicted last month on three counts of first-degree murder and three counts of second-degree murder
Police say he was spotted in a surveillance footage leaving the scene of the last shooting, on Nov. 16, with a duffel bag.

They said a sawed-off rifle used in the killings was found in the bag.

The other killings happened in July and August.

Perrone’s attorney entered a plea of not guilty for his client. He said Perrone maintains his innocence.

(AP)