PORTLAND, Ore. - A pregnant 21-year-old found dead with her baby no longer in her womb befriended the woman charged with killing her through Craigslist, her mother said yesterday.

Police said they found Heather M. Snively's body Friday in a crawl space in Korena Elaine Roberts' home in Beaverton, a Portland suburb. They'd been called there because a newborn wasn't breathing. The baby later died.

Roberts told officers she'd recently given birth to the baby boy, said Sgt. David Thompson of the Washington County Sheriff's Office, and both were taken to a hospital. Doctors could not save the baby, and they alerted authorities after determining that Roberts had not given birth.

Roberts, 27, was charged with murder in Snively's death and could face charges in the baby's death as well, Thompson said. She was being held without bond and the jail did not list an attorney.

Autopsy results were to be released today and Thompson would not say whether Snively gave birth before she died or the baby was removed. Police have not released a motive for the killing.

Snively's mother, Heidi Kidd, of St. Albans, W.Va., said Snively met Roberts a few weeks ago through Craigslist, the online classified service. Roberts told Snively she was pregnant and wanted baby clothes, Kidd said. They befriended one another and kept talking online.

"I guess they decided to meet and I guess that was the wrong thing to do," she said. "But Heather's always been a very trusting person."

Thompson said detectives have not confirmed the women met through Craigslist.

Roberts has two children, both under 10, who were staying with relatives and not at home when police believe Snively was killed, Thompson said.

Kidd said her daughter was eight months pregnant, and Snively's Facebook photo shows her lifting a pink shirt to expose a large belly.

Snively and her boyfriend, identified by Kidd as Christopher Popp, recently moved to Oregon from Maryland because he got a better job. Popp, the baby's father, reported Snively missing Friday night and is not a suspect, Thompson said.

Kidd said her first grandson was to be named John Steven.

"I'm still in shock; it hasn't hit me," she said. "I mean, that initial phone call; I just couldn't believe it. I just could not believe I was talking about my own child." *