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 testing has confirmed Travis Decker, a Washington state father accused of killing his three daughters in June, is the sole suspect in the murders, authorities said Tuesday.

(CNN) - Investigators believe Travis Decker is the only suspect in his daughters’ killings. The Washington state father of three is still on the run nearly three months after his daughters were found dead near a campsite in the Cascades.