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"She seemed like a fun party girl, someone that would probably get along well with our group of friends," said Clint House, who was a roommate of Casey's then-boyfriend Anthony Lazarro.
Casey even entered a "hot body" contest at the local Fusion nightclub in Florida, said House.
At the time, Casey's daughter was officially missing and would later be found dead. Prosecutors allege Casey killed her; Casey's defense claims the child accidentally drowned in a family swimming pool and that Casey lied about it, her behavior influenced by psychological scars from childhood sexual abuse.
Either way, Casey showed no signs that anything was wrong.
"She was not an introvert by any means. She liked to have a good time," said Nathan Lezniewicz, another former roommate of the boyfriend. "Looking back, there was no sign that anything was going on."