Monmouth County Prosecutor Christopher J. Gramiccioni is holding news conference to provide an update on the investigation into the murders last week of a technology CEO and his family at their Colts Neck mansion. Scroll down for live updates.

Keith Caneiro, 50, his wife, Jennifer, 45, and the couple's two children, 11-year-old Jesse and 8-year-old Sophia, were found slain after their home on Willow Brook Road erupted in flames on Nov. 20.

This morning, court records showed Paul Caneiro, the brother of Keith Caneiro, had been charged with murder.

Paul Caneiro, 51, of Ocean had been in custody already on suspicion of setting fire to his own home Nov. 20, the same day his brother and his family were found dead at their burning Colts Neck home.

Here are live updates from the press conference:

Gramiccioni outlined the additional charges against Paul Caneiro. They are four counts of murder, a new count of aggravated arson — the same charge he faced in Ocean Township with regards to his own home — and two weapons charges.

He repeatedly shot and killed his brother while outside the home then murdered the rest of the people inside the home, Gramiccioni said. He shot and stabbed Jennifer Caneiro and stabbed the two children, he said. Toxicology reports are pending to confirm the manner and cause of death of Jennifer Caneiro and the two children.

"This one is the most brutal cases that I've seen in my experience here," Gramiccioni said.

The defendant's motive was financial in nature, Gramiccioni said.

The origin of the fires at Ocean Township was at the exterior of the house. The Colts Neck fire was started in the home's basement, Gramiccioni said.

The fire in the basement continued to smolder until oxygen caused it to flare as the house was entered, he said.

The Colts Neck murders happened in the early hours of Nov. 20. After the slayings, Paul Caneriro took unspecified evidence with him, Gramiccioni said. He then drove to Ocean Township, where he set his own house on fire with his wife and two daughters inside, Gramiccioni said.

It was a "ruse," Gramiccioni said, an attempt to destroy evidence and create the illusion that the Caneiro family was being victimized and targeted.

There is no reason to believe that organized crime was involved in the crimes against Keith Caneiro and his family, Gramiccioni said.

"We are confident the defendant acted alone," he said.

Asked if New Jersey still had the death penalty did he believe Caneiro deserved to die should he be found guilty, Gramiccioni said, "I would have certified this case as a capital case, but that's not my job here."

Of the victims' survivors, Gramiccioni said: "Our collective hearts in the law enforcement community go out to you."

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