The Casey Anthony trial recorded another gripping data point Wednesday when George Anthony, Casey's father, said that Casey was the last person to see Caylee Anthony, Casey's daughter, alive.

George Anthony, who later broke down in tears while on the stand, also denied the defense team's claim that he had sexually abused Casey Anthony when she was a girl, ABCNews.com reported. George Anthony then went on to say that definitely something happened to Caylee and that I didn't want to believe then that my daughter could be capable of taking the life of her daughter.

Casey Anthony has been charged with first-degree murder. If convicted, she faces a possible death sentence. She has pleaded not guilty.

The prosecution claims Casey Anthony suffocated her daughter, Caylee, with duct tape in June 2008, then stored the body in the trunk of a car. Casey Anthony didn't report the toddler was missing for 31 days.

Conversely, the defense has concentrated on the prosecution's forensic evidence, including an FBI technician's testimony that duct tape found attached to Caylee Anthony's decomposed skull was contaminated during testing by another technician.

Last Friday, attorneys defending Casey Anthony Friday showed what they hope with be a compelling fact when jurors deliberate: the lawyers showed photos of 2-year-old Caylee climbing a ladder into the family's swimming pool.

Prosecutors, who rested their case last week, have presented ample evidence that Casey Anthony lied repeatedly, and that she is a habitual partier, but whether they have proved beyond a reasonable doubt that she murdered her 2-year-old daughter Caylee remains an open question, The Washington Post reported.