A researcher considered a key prosecution witness started off the third week of testimony in the trial of a Florida woman accused of killing her toddler daughter.
Arpad Vass, who has come up with a new technique for detecting decayed bodies, said Monday that he smelled an "overwhelmingly strong" odor of human decomposition in an air sample taken from the car of 25-year-old Casey Anthony.
"I jumped back a foot or two," Vass said of a can that contained air sampled from Anthony's Pontiac Sunfire. "It was shocking that little bitty can could have that much odor."
Prosecutors are trying to prove that Anthony suffocated her daughter, Caylee, with duct tape in 2008 and contend that traces of decomposition were found in her car. Her defense attorney says the toddler drowned in her grandparents' swimming pool.
The 2-year-old's skeletal remains were found in a wooded area not far from her grandparents' home. Anthony has pleaded not guilty, and if convicted, she could be sentenced to death.