New Evidence Implicating Caylee's Mom Out

A Florida woman accused of killing her two-year-old daughter rarely showed emotion in jail but became unhinged after she found out a toddler's remains had been found near her family's home, according to interviews with jail staff released Monday.

A shift supervisor at the jail where Casey Anthony is being held told investigators that Anthony cried and asked for sedatives after learning of the Dec. 11 discovery of the remains. DNA tests completed days later showed the remains belonged to her daughter, Caylee Anthony, who'd been missing for six months.

Orange County Corrections Lt. Tammy Unser told detectives she was surprised by Anthony's reaction because she hadn't shown emotion or asked for any other medication during her time behind bars. Before the request, "She was weird to talk to," Unser said. "I don't exactly know how to explain it. Non-emotional would probably be the best way to say it."

In a video, reports CBS News correspondent Kelly Cobiella, a jail supervisor describes Casey's reaction after she learned the remains had been found. She hyperventilated, he said, then "bent over and made complaints that she was feeling sick to her stomach and was going to throw up."

Weeks earlier, Anthony calmly asserted to investigators that she believed her daughter was still alive during an interview the day she was indicted on a first degree murder charge, according to another recording released by prosecutors Monday.

"You know certain things about your child. You can feel that connection," Anthony tells investigators during the Oct. 14 interview. "I know that she's alive whether you have a bucketload of evidence downstairs that contradicts that and says otherwise or all you have is speculation."

FBI Agent Nick Savage responds: "We have a lot or else we wouldn't have made it to this point. A lot."

Anthony's attorney, Jose Baez, declined through a spokeswoman to comment on Anthony's state of mind in jail.

Prosecutors wouldn't comment on the significance of the evidence released Monday, saying the release was done to satisfy public records requests.

Casey Anthony is set to stand trial in October the charge that she killed Caylee, who had gone missing about six months before the remains were found.

Casey Anthony claimed that Caylee was kidnapped by a nanny and has pleaded not guilty. Hundreds of volunteers helped search for Caylee after she was reported missing over the summer.

In February, the state attorney's office released documents showing the same type of laundry bag, duct tape and plastic bag discovered with the child's body also were found in the house where Caylee lived.

Cobiella adds that authorities revealed they hid four cameras in the car of Anthony's boyfriend, Tony Lazarro, last July and secretly-taped a two-hour conversation between him and Anthony's brother, Lee Anthony.

"I've never talked to this nanny," Lazarro is heard saying.

And Lee Anthony tells Lazarro his sister lies often, and he frequently tries to figure out her motives for doing so.