Susan Powell’s grieving parents are considering taken legal action against Washington state authorities over the child custody case that led to the death of their grandsons at the hands of their father, but RadarOnline.com can exclusively reveal that other family members believe that the only person to blame for the tragedy is Josh Powell himself.

“I haven’t heard anything about a lawsuit yet and they (Chuck and Judy Cox) haven't said anything to me about it,” Powell’s brother-in-law Kirk Graves

In another shocking development in the Josh Powell case, documents released on Friday reveal that law enforcement had known since 2009 that the deranged man had hundreds of graphically sexual images on his computer.

But the social service agencies entrusted in making sure his sons were safe following the mysterious disappearance of their mother, Susan, were never told of the discovery.

Murder-suicide assailant Josh Powell will not be buried next to his children that he killed, because two Washington police officers have bought the plots next to the boys.

Pierce County Sheriff's Sgt. Ed Troyer told KIRO FM in Seattle, "The bottom line is, Josh Powell will not be near those two boys."

Detectives investigating the murder-suicide committed by Josh Powell revealed this week that the house he saw the children at was a sham, but RadarOnline.com has exclusively learned that the social workers supervising the visits were oblivious to the deception that led to a deadly blaze.

“I don’t even know if law enforcement knew that,” Sherry Hill, Communication Officer for the Children's Administration at the Department of Social and Health Services told RadarOnline.com in an exclusive interview.

The images of Josh Powell’s burned out home have been flashed all around the globe, and now RadarOnline.com has learned a shocking revelation about the house where he attacked his two children with a hatchet before setting it on fire.

The home that Powell committed the horrific murder-suicide on February 5 was really just a sham to show the authorities, reported the Tacoma News Tribune, and he did not even live there or keep his belongings at the residence.

Charlie and Braden Powell, the two young boys hacked and burned to death by their own father last Sunday in a horrific murder/suicide, were laid to rest Saturday in Tacoma, Washington.

The Powell and Cox families came together to remember the two boys who were tragically slain at the young ages of seven and five.

PHOTOS: Josh Powell's Murdered Sons Are Laid To Rest

Even in death, Josh Powell is causing more outrage and disgust after police searching his home computer found computer-animated images that depicted "incestuous sex.”

The images showing obscene parent-child relations were so disturbing that their discovery prompted a psychologist to recommend last week that Powell undergo an intensive psychosexual evaluation, reported CBSNews.com.

The family of Josh and Susan Powell are still struggling to come to terms with Sunday’s horrific murder-suicide, and RadarOnline.com can exclusively reveal that the grieving relatives have very different feelings about who is to blame.

Josh’s sister, Alina Powell, shocked viewers on Thursday when she made the claim on Good Morning America that despite bludgeoning his two boys with a hatchet and then lighting a deadly fire

Just days after killing his sons in a vicious hellfire explosion, Josh Powell’s sister is still denying that he had anything to do with his wife’s disappearance, and said he was trying to “protect” the little boys.

In a shocking interview, Alina Powell defends her brother’s murderous actions, during which he took a hatchet and chopped at both Charles, 7, and Braden, 5, before setting the house on fire and killing them all.

The chilling 911 call from the social worker outside of Josh Powell’s house as he killed his two sons inside has haunted everyone who has heard it, and now RadarOnline.com can exclusively reveal that the social worker could not have done anything else to save their lives.

Elizabeth Griffin-Hall, a contracted care worker for the Foster Care Resource Network, was taking 5-year-old Braden and 7-year-old Charles for a supervised visit with their dad at his home in Graham, Washington, on Sunday