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.

Travis Decker is wanted on first-degree murder and kidnapping charges in connection with the deaths of Paityn, 9, Evelyn, 8, and Olivia, 5

Analysis from the Washington State Crime Lab found Decker’s and his daughter’s DNA on objects used in the killings. “The completion of this DNA analysis provides additional evidence that indicates Travis Decker is the only suspect involved in committing these homicides,” the Chelan County Sheriff’s Office said.