Police believe that Sante Kimes, 63, and her son, Kenneth Kimes Jr., 23, have financed luxurious lifestyles with deadly con games. Officials say their trail, which leads from the Bahamas to Florida to California, has ended in New York.
The pair is also suspected of being involved in the disappearance or death of two other people: Syed Bilal Ahmed, a Bahamian banker who disappeared in 1996, and David Kazdin, a Los Angeles businessman who was shot to death and found in a garbage bin March 14.
When the Kimeses were arrested, they had some of Silverman's identification cards and financial documents with them.
The New York Daily News, relying on unidentified law-enforcement sources, reported Tuesday that police found several syringes and a pink liquid that resembles Rohypnol, a sedative also known as "the date rape drug," inside the Kimeses' car.
On Monday, the Kimeses' attorneys denied that their clients had anything to do with any of those cases.
Jose A. Muniz, attorney for Sante Kimes, said he's confident that DNA samples taken by police on blood stains found on the sidewalk in front of Silverman's house and in the Kimeses' car will eventually clear their clients.
"I will say this: They are not murderers," he said. "Con artists? Well, I don't know. That's a very strong term."
New York City Police Commissioner Howard Safir told CBS 'This Morning' Co-Anchor Mark McEwen that he expects the already bizarre case will get stranger.
"Every day, we're getting more and more police departments around the country and around the world who have unsolved cases where they're looking to see if the Kimeses were involved," Safir said.