Chloroform Found in Caylee Car Trunk

FBI tests have found traces of chloroform in the trunk of the car belonging to the mother of missing toddler Caylee Anthony, a source told CNN. Mom Casey Anthony's computer also revealed web searches about chloroform, which can be used to incapacitate people but is fatal in excessive doses.

Prosecutors are expected to build a case against Anthony using the chloroform evidence, along with traces of human decomposition in the car and a hair found in the trunk that investigators believe is Caylee's. Dozens of people are continuing to search the area in and around Orlando, Fla., for Caylee, who has been missing since June. Her mother remains behind bars on unrelated fraud charges.