Levi Aron, right, the suspect accused of killing and dismembering eight-year-old Brooklyn boy Leiby Kletzy,
A lawyer for the Borough Park madman accused of butchering a lost little boy said that Levi Aron's actions can be partially pinned on in-breeding.
"Look, everybody knows when blood relations have offspring, there can be genetic defects," Howard Greenberg said. "It's something that needs to be investigated down to the ground."
Aron, 35, is accused of kidnapping 8-year-old Leiby Kletzky off a Borough Park street in July, then killing and dismembering him.
The little boy was alone for the first time trying to meet his mother when he was snatched off the street, setting off a massive search that ended in horror inside Aron's apartment.
Several of Leiby's body parts in Dumpsters, authorities said.
Aron did not appear in person for his latest court date, but instead was flashed into the courtroom on a television screen. He was slumped over and seated alone at a table at Rikers Island.
"He's catatonic," Greenberg said.
The lawyer repeated outside of the courtroom that he will pursue an insanity defense. Aron has already been found fit to stand trial.
"It's a very simple case," Greenberg said. "You don't do this unless you're crazy."
The flamboyant defense lawyer previously vowed to quit the practice of criminal law if Aron isn't found to be insane.