DNA testing has confirmed Travis Decker as the sole suspect in the June murders of his three daughters, ages 5, 8, and 9, in Washington.

His DNA was found on plastic bags and cable ties used in the killings, with no other profiles detected.

The girls’ bodies and Decker’s truck were discovered near a campground on June 2.

Decker, a former Army soldier, remains at large, and authorities warn he is armed and dangerous, CBS News has reported.

A $20,000 reward is being offered for information leading to his capture.