At Home With Caylee Anthony

Caylee Anthony and her grandfather George Anthony on a visit to the Sanford Zoo in Florida on May 27, 2007. George Anthony is determined to find out what happened to Caylee. "I'd give my house. I'll give my car. My wife will give her car. We'll give our money out of our pocket, anything," he said. "This is too important for me. … I'll never give up, same as my wife. We won't give up. Our son won't give up." (Exclusive to ABC News)