ORANGE COUNTY, Fla. -- One of the most intriguing parts of the Anthony case is Casey's car and what investigators found in the trunk. Her mother Cindy claimed the smell of human decomposition was created by an old pizza, so Channel 9 decided to test that theory.

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VIDEO REPORT: New WFTV Experiments To Test "Rotten Pizza Experiment"

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The pizza was kept in a car trunk for 12 days and became hard as a rock and had no odor at all (read previous report). But the Anthony family told Eyewitness News the experiment wasn't conducted correctly.

"You can't just put a pizza box in something and expect it's gonna react," George Anthony told Eyewitness News.

Since George Anthony questioned the validity of the experiment, Eyewitness News decided to do it again. But with his instructions, it's going to be more complex. This time it will involve four meat pizzas, two kinds of laundry detergent and kitchen garbage bags.

"You need to put some pizza, pizza box, an Arm and Hammer laundry detergent container, put it in a bag, a kitchen bag about 18 inches tall.

And since maggots come from fly eggs, Eyewitness News was careful not to shoe them away. To get George's experiment right, Eyewitness News is going to do four separate tests, starting with four pizza boxes in four separate bags.

Here's where it becomes more complex, because it's unclear if it was liquid or powder detergent or if the detergent was in its container or not, so the experiment will be done four ways.

Liquid detergent will be poured in bag one, a closed container in bag two, powdered detergent poured in bag three and boxed powered detergent into bag four. All four bags will be sealed and put inside a trunk of a car.

"Put it in your vehicle for 15 days. Put it in your trunk, don't open it, just let it sit there for 15 days," George told Eyewitness News.

Although Cindy Anthony claims it was 12 days, the Eyewitness News experiment will see if 15 days creates conditions that would fool a homicide detective and two cadaver dogs.