Andrea Curry-Demus is charged with homicide and kidnapping in the death of 18-year-old Kia Johnson. In court papers, police say they have video surveillance at the Allegheny County Jail from Tuesday showing Johnson and Curry-Demus talking.
CBS affiliate KDKA in Pittsburgh reported that the police are still trying to determine if the jailhouse encounter between Johnson and Curry-Demus was the first time their paths crossed.
"We're not convinced one way or another," said Allegheny County Police Superindendant Charles Moffatt.
Police say Curry-Demus denied meeting Johnson but that she told investigators her fingerprints would be on duct tape and plastic used to wrap the body.
Curry-Demus showed up at a Pittsburgh hospital Thursday with the newborn, claiming it as her own. Officials say tests proved she was not the mother. She told officials she had bought the baby for $1,000. Johnson's body was later found in Curry-Demus's apartment.
Dr. Karl Williams, the medical examiner, said Johnson's identity was confirmed with dental records.
Investigators are trying to verify whether Johnson was the mother of the baby boy Curry-Demus, 38, took to the hospital.
"The uterus appeared gravid, which means that there had been a baby there," Williams said at a news conference Saturday. Detectives found placenta at the scene, he said.
The baby was "apparently doing well," Williams said. The hospital would not release any information about the boy's condition. Authorities say the baby is "under observation."
Before the body was found, Curry-Demus was charged with child endangerment and dealing in infant children, and ordered jailed in lieu of $10,000 bail and a psychiatric exam.
In 1990, Curry-Demus, then known as Andrea Curry, was accused of stabbing a woman in an alleged plot to steal the woman's infant. A day after that stabbing, Curry-Demus snatched a 3-week-old baby girl from a hospital. The baby was found unharmed with Curry-Demus at her home the next day.
Curry-Demus pleaded guilty in 1991 to various charges from both incidents and got three to 10 years in prison, according to court records. She was paroled in August 1998.