A safe found in the home of a slain Florida couple known for adopting special-needs children contained about $100,000, a source familiar with the investigation told CNN late Tuesday.

The safe is the second one belonging to Byrd and Melanie Billings of Beulah, Florida. The source said the suspects in the Billingses’ shooting deaths believed the safe was the mother lode of valuables at the house, but were unable to get into it.

Escambia County Sheriff David Morgan would not confirm existence of a second safe and said he was “not at liberty to address that issue.”

“I can only confirm the items we know were removed from the Billings home,” Morgan said — a small safe that contained prescription medication, family documents and some jewelry, and a briefcase that contained nothing significant.

Billings family attorney Crystal Spencer told CNN she had no comment because of the ongoing investigation.

Police have said a safe containing prescription medication, family documents and some jewelry was taken from the Billings home at the time of the slayings. It was found in a suspect’s backyard, buried with bricks on top in what Morgan said was an “obvious attempt to conceal it.”

Meanwhile, one of seven suspects charged with murder in the couple’s deaths couple told police another suspect, believed by authorities to be the organizer of the slayings, was the lone gunman, according to court documents released Tuesday.

Frederick Thornton told police a man he knew as “Pat” was the organizer of the July 9 home invasion-robbery at the home, according to an affidavit in support of a search warrant.

Thornton said “Pat” — whose description matches that of suspect Leonard Patrick Gonzalez Jr. — was the “only shooter from the incident,” according to the court documents.

The affidavit sought a search warrant for a minivan belonging to an eighth suspect, Pamela Wiggins, who is charged with being an accessory after the fact. In it, police said Thornton told authorities that after the robbery, he and the others involved rode in an older red van to an unknown location up the road, where a safe taken from the home was moved into a red minivan parked on the side of the road.

The group then met at an antiques store in nearby Gulf Breeze, Florida, where Thornton said he met a female who was in the minivan, the affidavit said.

The documents also said another suspect, Wayne Coldiron, admitted his involvement in the robbery and told police he went to a Gulf Breeze home that contained weapons used in the home invasion. A search of that residence found a number of firearms and ammunition, including a 9 mm handgun, the same caliber of weapon used in the homicides, according to the affidavit.

Coldiron told police a female named Pam was at that residence and drove a maroon-colored minivan, the document said.

In an interview with police, Wiggins denied any involvement in the robbery or the homicides, but said she was a friend of Gonzalez and he had a key to the residence “and permission to come and go as he pleased,” according to the affidavit. Wiggins drives a red minivan, according to the documents. Property records indicate she also co-owns an antiques store.

Search warrant returns for Wiggins’ van and suspect Donald Stallworth’s vehicle were also released Tuesday. Numerous items were seized from both vehicles. Among the items found in Stallworth’s vehicle were four 12-gauge shotgun shells, a pair of black gloves and two black stocking caps inside a backpack, the documents said.

Attempts by CNN to reach Wiggins and her attorney have been unsuccessful.

On Monday, Escambia County, Florida, Sheriff David Morgan said the suspects in the Billingses’ slaying did a dry run of the attack at the couple’s home about a month before they stormed the residence. And court documents said Gonzalez knew the victims and received financial support from them for a martial arts studio he ran.

Crystal Spencer, an attorney for the Billings family, said, “My understanding is, through speaking with the investigative agencies, that Mr. Gonzalez sought donations from a variety of community and business leaders and that perhaps Mr. Billings did not lend him money, but donated to this academy for children. It was … a self-defense academy for children. But the connection goes no further that we are aware of.”