Lee Anthony, the brother of accused killer Casey Anthony testified on Tuesday that he smelled a potent and very strong odor in Casey's Pontiac Sunfire at the garage in their home.

Casey Anthony, 25, is on trial for first-degree murder and could face the death penalty if convicted of killing her 2-year old daughter by smothering her with duct tape on June 16, 2008.

Casey's defense attorney has said Caylee drowned on June 16 at the home where Casey lived with her parents in Orlando, Florida. Caylee's skeleton was found six months later in woods near her home.

Casey's mother, Cindy Anthony testified earlier that Casey's car smelled like human decomposition as did father George Anthony.

He said his mother and sister were combative as they spoke about where Caylee was.

Nothing was making sense to me ... why couldn't we or anybody just go get Caylee and bring her home. There' no reason to fight with mom at this point, Lee said he told his sister.

Lee said Casey confessed Caylee had been missing for 31 days when she was told that police were on their way and that they would go to the nanny's house where Casey said Caylee was whether she wanted to or not.

She just looked at me really with no reaction, Lee said. She told me that she had not seen Caylee in 31 days, that she had been kidnapped and that the nanny took her.

A police officer on the scene, Brendan Fletcher, said he drove to the Sawgrass Apartments where Casey said a nanny named Zenaida Fernandez-Gonzalez was. The apartment had no furniture, the police officers said after looking inside.