Whatever the FBI are looking for, it would not appear to be a living child.
http://www.torontosun.com/2011/10/07/fbi-searches-landfill-in-case-of-missing-baby-girl
Grim search: FBI agents in white sterile suits combed a Kansas landfill as they looked for baby Lisa today
Coming up empty: More than a dozen FBI agents and officers were at the waste dump but did not appear to collect evidence
http://www.torontosun.com/2011/10/07/fbi-searches-landfill-in-case-of-missing-baby-girl