The youngest brother of accused quadruple murderer Paul Caneiro is laying low at his tony Jersey Shore home after being fingered this week by his sibling’s lawyers as the real monster behind the gruesome Colts Neck, NJ killings.

Corey Caneiro, 52, was spotted at his oceanfront mansion in Sea Bright Thursday, three days after attorney Monika Mastellone claimed in court he should have been investigated for the sensational 2018 murders of his brother Keith, sister-in-law, and young niece and nephew.

Brother Paul is the one prosecutors say slaughtered the family as financial troubles between him and Keith came to a boiling point.

Corey’s money problems were allegedly far worse than Paul’s, Mastellone said Jan. 12 in court.

But there were no apparent signs of financial troubles outside Corey Caneiro’s home this week — where a white 2005 Porsche Boxster and a black 2006 Porsche 911 — were parked.

Corey, sporting a pink hoodie, shades and a cap, refused to answer questions, then zipped away in the black coupe.

Paul Caneiro also fancied Porches, leasing three of the German autos, including the SUV model Macan, even as his businesses cratered and debts mounted back in 2018, prosecutors revealed.

He paid $10,000 of a lease for an Audi Q5 belonging to his alleged mistress, Yisele Restrepo, prosecutors said during opening arguments.

Authorities say financial pressure stemming from Paul Caneiro’s affair, along with a raft of other money problems, led to his killing spree.

Paul Caneiro, deep in debt and desperate to stay afloat, siphoned $78,000 from a trust belonging to his brother Keith — and led to an explosive confrontation between the two, prosecutors alleged.

Hours later, Paul allegedly ambushed and shot his brother Keith, and fatally stabbed sister-in-law Jennifer; nephew Jesse, 11; and niece, Sophia, 8, and then set fire to their chic Colts Neck home.

Paul Caneiro then set the fire to his own home to create the impression both he and Keith were being targeted, prosecutors said.