Casey Anthony's former boyfriend testified that the young mom seemed to be having the time of her life during the period prosecutors say she killed her toddler daughter. Tony Lazarra said he and Anthony "hit it off" after meeting on Facebook and the couple spent hot nights in his bedroom and on dance floors shortly before and after cops say the mom killed Caylee. Anthony even participated in a "hot body" contest at one nightclub, said Lazarra. She told him that Caylee was either visiting Disney World or at the beach with her babysitter. Anthony "seemed like a fun party girl," Lazarra's roommate testified. "When she started staying with us regularly, we stopped seeing Caylee."
Prosecutors were clearly aiming to reveal Anthony, 25, as a remorseless killer mom reveling in her new-found fun, freed from the responsibilities of caring for a child, notes ABC News. In a surprise turnaround, Anthony's attorney announced Tuesday that Caylee drowned in her grandparents' pool, and that Anthony and her father tried to cover it up. Anthony, who waited more than a month to report her daughter's disappearance, had earlier claimed the girl was kidnapped by her babysitter. Though authorities eventually located Caylee's remains near Anthony's home, they haven't been able to determine a cause of death. (Read more Casey Anthony stories.)