This story contains information that may be disturbing to some readers.As the search for Travis Decker -- the dad accused of killing his three daughters -- has almost reached the three-month mark, officials are revealing disturbing new details about the crime scene and the evidence that they say indicates he is the sole suspect.Paityn Decker, 9; Evelyn Decker, 8; and Olivia Decker, 5, were found dead near the Rock Island Campground in Chelan County, Washington, on June 2, after they left home for a planned visit with their father on May 30, according to police.Court documents obtained by ABC News in June revealed there were plastic bags over the heads of each girl and their wrists were zip-tied, but a new press release from officials on Monday provided new details about how the children were found.Three young sisters in Washington, Olivia Decker, 5, Paityn Decker, 9, and Evelyn Decker, 8 who had not been seen since they left home for a scheduled visitation with their father have been found dead, according to the Wenatchee Police Department.Wenatchee Police Department"Two of the victims each had two separate bags over their heads and the third victim had three separate bags over their head," officials said.In addition to the plastic bags, "several cable ties were located on the ground in the immediate area of the bodies," officials said.Authorities collected the plastic bags and the cable ties and submitted the items to the Washington State Crime Lab for DNA analysis, officials said.MORE: Travis Decker search: Police footage shows father accused of murdering kids 3 days before disappearanceOn Aug.6, the crime lab reported that the "DNA profiles matching Travis Decker were found on the plastic bags" and on the cable ties, confirming to officials that he is the sole suspect."The completion of this DNA analysis provides additional evidence that indicates Travis Decker is the only suspect involved in committing these homicides," officials said.DNA matching the three dau...