But the inspectors general, working with the Justice Department and the Federal Bureau of Investigation, will not conduct a technical evaluation.

She said postal inspectors conducted an hourlong class at the university yesterday to help campus police officials, postal workers and college deans guard against mail bombs.

Just six to eight inspectors are now in the field at a time, conducting only the most urgent inspections.

The inspectors also conduct pre-licensing checks for sites that do not engage in animal research or transportation, of which more than 4000 exist (e.g. dog kennels).

"Our inspectors have conducted a top-to-bottom inspection to ensure compliance with all of the applicable safety regulations," Ms. Givner said.

Previously, two inspectors could conduct all inspections and therefore had more opportunty to extort payoffs, officials said.

In 2003, inspectors led by David Kay conducted additional investigation of Curveball's credibility.

Other work that state regulators reported that inspectors conducted included licensing and administrative work.

Other work that state regulators reported that inspectors conducted included investigating consumer complaints and administrative work.

The researchers collected crash scene data through interviews with drivers, passengers, and witnesses, and the inspectors conducted thorough inspections of the trucks, the drivers?