COLTS NECK, NJ —Keith Caneiro, his wife, Jennifer, and their two children, ages 11 and 8, were murdered in a targeted homicide, the Monmouth County prosecutor said during a press conference Wednesday, giving the latest on this stunning and tragic story out of Colts Neck.

The Caneiro family also all died Tuesday before their home on was set on fire, the prosecutor said. "This family was targeted. All four of them were victims of homicidal violence before the fire was set at their home," said Prosecutor Christopher Gramiccioni, speaking Wednesday afternoon. "Sadly, each of these individuals were the victims of homicidal violence at some point prior to when the fire was set at 15 Willow Brook. This is one of the most heinous cases we've ever investigated or seen."

But Gramiccioni stopped short of saying that Caneiro's older brother, Paul Caneiro, is a suspect in the quadruple murder of his brother and his family. Paul Caneiro, 51, was arrested Wednesday morning and charged with setting his own Ocean Township home on fire earlier on Tuesday. The two brothers were in business together. There is not a quadruple murderer on the loose, the prosecutor said, without elaborating. In fact, a big hold-up in the case right now is the inability of murder detectives to even get into the Colts Neck estate at 15 Willow Brook Road and look for evidence, the prosecutor said.

"I cannot confirm or deny if he is a suspect," said Gramiccioni of the elder Caneiro brother. "All I can say is we are investigating if these two cases are related. We can't charge people unless we have evidence. "Bear in mind, we are still waiting for county investigators to let us in there (to the house). The scene hasn't been rendered safe. We need to make sure the roof doesn't cave in and things of that nature. I expect we will get in there in the next few hours," vowed the prosecutor.

Paul Caneiro set fire to his suburban Ocean Township home while his wife and two daughters were inside, police said. Police say he used gasoline to set his own home at 27 Tilton Drive on fire at 5:01 a.m. Tuesday. His wife and two daughters were in the home at the time, the prosecutor said, but all four family members escaped, unharmed.

Seven hours later, at 12:45 p.m. Tuesday, Caneiro's younger brother, Keith Caneiro, 50, and his wife, Jennifer, 45, and their two children were found dead at their Colts Neck estate. Keith Caneiro was found shot to death on the front lawn, according to the Monmouth County prosecutor. The bodies of the wife and children were inside: Eleven-year-old Jesse and 8-year-old Sophia are the children who died at the scene. The prosecutor said it was difficult for the medical examiner to identify the bodies of the wife and children, as they were badly burned.

"Mr. Caneiro was found outside the home, and his wife and two children were found inside the home. Keith, whose remains were found in front of the home, was shot but I can't go any further," said prosecutor. "We believe this family was targeted. I do believe this was a targeted situation with the Caneiro family. We have no reason to believe this was a suicide. They were all victims of homicides." RELATED: Colts Neck Homicide: Horrifying Photos Show Caneiro Mansion Fire