Early today police discovered Sweeten's silver GMC Yukon Denali, which they reported finding unlocked, without keys and with a parking ticket on its windshield in Center City, an area of downtown Philadelphia that is well-known for its bustling restaurants and shops.
Sweeten, a mother of three children, has an 8-month-old baby with her husband, Larry Sweeten. They live in Feasterville, Pa. Police in the suburb where Sweeten lives indicated that family members are known to them.
ABCNews.com was unable to reach Anthony Rakoczy, Sweeten's ex-husband with whom she had two children: Paige, 15, and Julia, 9.
On NBC's "Today" show today, Rakoczy said that he did not know why anyone would abduct his ex-wife and daughter.
"I have no clue," said Rakoczy, who said he has maintained a good relationship with Sweeten since their divorce.
Rakoczy said that Sweeten was known for being "very organized" and that his daughter was "always dancing around the house" and "loved sports."