Travis Decker is accused of killing his three young daughters, whose bodies were found near a campground in central Washington.

As authorities continue their search for Travis Decker, the Washington state man accused of suffocating his three daughters to death, investigators now believe he is the only suspect in the crime based on evidence found at the gruesome scene.

DNA profiles matching that of Decker were found on the plastic bags that were used to suffocate Evelyn, 8, Paityn, 9, and Olivia Decker, 5.