Upon the 2003 invasion of Iraq in March 2003, a major investigation on the ground began, that also further increased public attention to the matter. In April 2003, Speicher's possible initials were discovered in a cell at Hakmiyah prison in Baghdad. Investigators did not think it was significant because a similar carving of "MJN" was found directly above the "MSS" scrawl. Subsequent tests on hair found in the cell's drain did not match Speicher's DNA. Senator Nelson went to Iraq to visit the prison personally. Speicher's name was also found on a document in Iraq, dated January 2003, that had the names of prisoners being held in the country. Officials stated that the 90-page document offered no evidence of whether Speicher was alive and might have been written either to provide an accounting of former Iraqi POWs or to confuse the U.S. military.