"We investigate all leads just because that's the proper protocol to follow through," Mazzeo said.
Authorities also are looking closely at Barbour's claims that she was involved in Satanism, according to another law enforcement source close to the investigation. But Gilmore, of the Church of Satan, said his church has a "law and order philosophy" that does not condone killing. He said the church has had no contact with Miranda Barbour or her husband.
Caison, the founder of the Wilmington-based Community United Effort Center for Missing Persons, has worked with murderers before in hopes of bringing closure to people whose loved ones haven't been seen in years. In 2009, her organization helped find the body of Alice Donovan, who was abducted and murdered seven years earlier, after Donovan's convicted killer wrote to tell Caison where the remains could be found.
"Anytime anything like this happens, we start getting emails and phone calls. I started getting texts last night," Caison said. But she said Barbour will have to be questioned extensively by investigators before those claims can be put to the test.
"You can't just say you've killed 22 people between this region and that region," Caison said. "You've got to give a town or something that only police or an organization like us would know." Without details like the gender, age or race of a victim, "We don't even know where to start," she said.
And like Levin, she cast doubt on Barbour's claims.
"That's a lot of people to kill in such a short time, and being so young and never making a mistake, I'm hard pressed to believe that amount," she said. And for the families she works with, "You don't want to build any false hope."
Getting the interview
Scarcella told WNEP he got the interview after Barbour sent him a letter saying she wanted to talk.
Scarcella told CNN on Sunday that he was not allowed to bring a notepad or any other recording device into the interview. He said police allowed him to listen to the interview after it was conducted.
In his interview with WNEP, Scarcella described Barbour as "very meek, very mild" with a "very low voice."
"She never hesitated once," he told the station. "She never gave the impression of it was a rehearsal."
Scarcella said he eventually asked if she had any remorse.
"And she said, 'None,'" Scarcella told WNEP.
But that's not what Scarcella said he found most surprising.
That would be, he said, "the fact that she said that if she got out she would do it again."