PORT ANGELES, Wash. -- Authorities combing through 60 tons of trash in a Washington land fill, searching for the body of a baby allegedly dumped by his 16-year-old mother, found a dead infant in the garbage Monday.

Port Angeles Police Chief Terry Gallagher said it could take weeks to get the DNA test results that will show whether the baby is that of the teenager arrested Friday for investigation of first-degree murder.

The 16-year-old teen, who has not been identified because of her age, moved from Colorado in October, reported the Peninsula Daily News.

The girl's father, Ronald E. Last Jr., 41, was arrested in Port Angeles, Wash., Friday for investigation of concealing a birth by allegedly disposing of the body.

The girl is under arrest for investigation of first-degree murder.

The newborn was allegedly put in a city garbage container behind the Last home at 116 E. 12th St. in Port Angeles. It was picked up and then transported to Tacoma.

Port Angeles police Chief Terry Gallagher said that Tacoma police, Pierce County sheriff's deputies and investigators from a State Patrol crime laboratory were helping his officers sift through the contents of the containers at the site.

"They have quite literally a mountain of garbage to go through ... 60 tons," Gallagher said. "We've never really had to do that before."

The garbage containers were intercepted before they could be emptied as usual at a transfer station in Tacoma and were taken to Graham, where there was more room to use heavy machinery to help comb through the contents, the police chief said.

"We believe that it is at least somewhat compacted," he said. "The machines will slowly pick through the garbage with the investigators nearby."

Gallagher told the Peninsula Daily News in Port Angeles that a woman came to the police station Friday and said she had seen a baby in a trash can in an alley behind the girl's house, but the can was empty when officers arrived.

"This is a very sad case," Gallagher said. "I think it is particularly tragic that this girl had so little support that she wasn't able to recognize any other option than what happened."

The girl allegedly gave birth on Dec. 30, 2008, and police believe the newborn died after birth and then was disposed of.

The teen is being held in a youth center and her father is being held in the county jail pending the filing of formal charges.

Police also found a pipe bomb in the garage of the home while searching for evidence, but little information was released on the discovery.

Read more in the Peninsula Daily News.