In a sinister oil-for-murder plot, Saddam Hussein used the scandal-plagued U.N. oil-for-food program to set up the assassination of a prominent Iraqi exile politician, the slain man's family has charged. A mysterious George Tarkhaynan appears on an Iraqi Oil Ministry list, published by a Baghdad newspaper, of 270 politicians and businessmen who received sweetheart oil deals under the U.N. humanitarian program. Safia al-Souhail, a leading political figure in post-Saddam Iraq, told The Post she has evidence that Tarkhaynan is a former Beirut shirtmaker and once-trusted family friend who helped Iraq assassinate her father, anti-Saddam dissident Sheik Taleb al-Souhail al-Tamimi, in...