A New Jersey man charged with killing his brother and the brother's wife and two children has pleaded not guilty to insurance fraud.

Paul Caneiro's public defender entered the plea on his behalf in court in Monmouth County on Monday.

Prosecutors allege he continued to work and receive income through his wife while collecting disability insurance following a 2012 motor vehicle accident.

Caneiro already faces four counts of murder, along with arson and weapons charges, in the Nov. 20, 2018, deaths of his brother Keith; Keith's wife, Jennifer; their 11-year-old son, Jesse; and their 8-year-old daughter, Sophia. He pleaded not guilty to this first set of charges in March.

Authorities have alleged Caneiro shot his brother, shot and stabbed his sister-in-law and stabbed the children before dawn that day, then set the mansion on fire and returned home in Ocean Township to set fire to his own home as his wife and two adult daughters slept upstairs.

After his arrest in that fire, his then-lawyers said his family believed he had rescued them. Authorities don't believe he meant to harm his immediate family.

Officials have said the motive for the murders appears to be money. The Caneiro brothers had started a computer consulting business in Brooklyn that had grown to have 26 employees by 2001, with clients including Citibank. They had renamed it Square One, and moved to the quieter New Jersey suburbs.

They married and started families — with each brother standing up for the other at their weddings — and added a pest control company along the way.

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Caneiro was about to be cut off from their technology company after money allegedly went missing from the firm, according to previous court filings.