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.

Authorities said DNA testing has confirmed that the sole suspect in the killing of three young girls in Washington state over two months ago is their father, who has still not been located.