Paul Caneiro, 51, is charged with four first degree murders, illegal possession of weapons and a criminal fire, according to charges laid Thursday morning in a lawsuit filed in Colts Neck , in New Jersey. .
He did not write a plea, according to the archives.
The charges against Caneiro only indicate that the offenses were committed on November 20.
On that date, Keith and Jennifer Caneiro and their children, 11-year-old Jesse and 8-year-old Sophia, were killed and their Colts Neck mansion burnt on purpose, authorities said.
Keith Caneiro, Paul Caneiro's younger brother and business partner, was shot dead and found in front of the house. The other three victims were killed in "homicidal violence at some point before the fire," in Monmouth County Attorney Christopher Gramiccioni said at that time.
The bodies of the woman and children were found severely burned inside the house and the authorities ruled out "a suicide angle," said Gramiccioni.
A spokesman for the prosecutor's office declined to say whether the charges against Paul Caneiro were related to the death of his brother's family. The prosecutor will release more details about the case Thursday at a press conference scheduled at 11 am (ET), spokesman Chris Swendeman said.
Family member and accused business partner
It was unclear whether the fire chief described in the complaint filed on Thursday related to the Ocean Township fire or whether it was an additional charge.
The emergency call for the Colts Neck mansion fire arrived at 12:38 pm. – more than seven hours after the Township of Ocean fire – and more than 20 Fire departments responded to the call.
Caneiro's lawyer, Robert Honecker, defended his client last week against the initial criminal arson charge and against any further charges.
"My client maintains his innocence on this charge and on any other potential charges," he told CNN on Saturday. "His family fully supports his defense of this charge and he expects his case to be justified when the case is resolved."
Paul and Keith Caneiro are cited as the only executives of a company involved in the sale and service of computers, according to New Jersey documents.
The couple registered an Asbury Park-based company named Jay-Martin Systems, which operated the "Square One" business, whose recordings date back to 2014. The company is described as engaged in the "sale and service of 39; computers. " A filing in 2007 indicates that Keith was the president of the company.
Honecker told CNN that the two brothers were best friends and that they were chatting almost daily, adding that he had no reason to believe that there was an animosity between them.