Late in the evening, the man had the child in some sort of underground bunker or storm shelter, and SWAT team members were communicating with him through aPVC pipe, CNN affiliate WSFA reported.
Phthalates, the chemicals that make aPVC container flexible, "can migrate out of the plastic when it's heated, " says Dr. Halden, who has done comprehensive studies on emerging contaminants and plastics for more than a decade.