Casey's Dad: She Drugged Caylee!

Ex-cop speaks out at last – and wishes MONSTER MOM was behind bars!

CASEY Anthony’s father has finally broken his silence — and provided heartbreaking details on how the nation’s most reviled mom drugged her daughter, Caylee, then coldly disposed of the body.

In a world exclusive interview with National ENQUIRER investigators who produced the documentary “Casey Anthony: An American Murder Mystery,” George Anthony said he thinks his misfit daughter medicated 2-year-old Caylee with the potent anti-anxiety drug Xanax, which can cause drowsiness and even seizures!

In a fascinating new twist, the masterminds behind the series have learned Casey exposed her vile plot when she claimed “Zanny the Nanny” had kidnapped Caylee — because “zanny” is a street name for Xanax!

“Caylee was always a very healthy child,” former police officer George told makers of the shocking documentary.

“But there were times when she would sleep for 10, 12, 13 hours at a time. It made no sense to me.”

Even more disturbing, Caylee was totally different from one day to the next — and sometimes had a “blackness underneath her eyes,” he revealed.

“A child her age would not have that unless something was going on. I believe Casey gave her something!” he insisted. Adding fuel to the fire, several friends of Casey had a “steady supply” of mind-bending psychiatric medications, he said.