The video surfaced hours after TMZ received an unverified ransom note demanding millions of dollars in bitcoin in exchange for Nancy's safe return.
Briana Flowers, 31, and her male friend Anfernee Pollard, 31, were found with gunshot wounds at the former's residence on Jan. 28.
Their marriage ended in divorce in 1975, and two years later she went on to marry then–New Castle County Councilman Joe Biden, who would later become president.
Officials previously said Nancy — the mother of Today show host Savannah Guthrie — was last seen at her home around 9:45 p.m. on Saturday.
Police also announced a $2,500 reward as they urged the public to come forward with any photos, videos, or information that could help identify and arrest the suspected abductor.
Earlier, 9 Democrats on the Oversight Committee joined Republicans in voting to hold Clinton in contempt, while three Democrats supported a similar move against Hillary Clinton.
Keith Roberts Jr. said he killed his ex-girlfriend because he did not want her to be with anyone else.
Chloe Castro, 29, pleaded guilty to sexually assaulting a student she met while working as a counselor in the Jefferson County Public Schools district.
Nancy was reported missing by her family around noon on Sunday in Tucson, Arizona, after she failed to turn up.
Chase Dalton, 22, was fatally shot by law enforcement on Jan. 20 during a sexual assault investigation.
The beloved grandmother was last seen around 9:45 p.m. on Saturday, when one of her children dropped her off at her home.
The sheriff declined to explain why investigators believe a crime may have taken place, saying it would be "inappropriate at this time."
Homicide detectives have joined the investigation following "concerning" evidence found at her home.
The hospital reportedly had only one of the two antivenom doses she needed, prompting Ezugwu to rush out to find the second.
Dated September 21, 2011, the email also includes a pointed remark, with Ferguson appearing to criticize Epstein for cutting off contact with her.