WMDs in Iraq. The back story?

I want to know a lot more about Mr.Gaubatz, but his story is upsetting and intriguing.

Dave Gaubatz is a former U.S. Federal Agent with the Air Force Office of Special Investigations (OSI) and is both an Arabic linguist and a counter-terrorism specialist. Mr. Gaubatz was sent to southern Iraq, along with five other OSI agents, concurrent with the beginning of Operation Iraqi Freedom with the mandate to search for WMDs. During this mission and with the aide of numerous Iraqi sources Mr. Gaubatz, along with his colleagues, identified four sites that were suspect. The Iraqis who assisted with the mission (ranging from doctors, engineers and farmers, to police officers and government officials) explained to the OSI agents that the WMDs had been buried at the specific locations within concrete bunkers in certain sections of rivers, and in the sewage system. Along with the Iraqi sources' accounts, there was an abundance of circumstantial evidence in the area near each site pointing to some type of chemical/biological activity. This evidence included protective equipment (gas masks), and decontamination and antidote materials, as well as missile imprints. The team of agents submitted a complete report to their chain of command; the report was supplied to the U.S. Weapons Inspectors in Northern Iraq in 2003 as well. The four sites identified were not only never searched, but have not yet been secured.