Giuliani probe includes look at move to oust ambassador Eric Tucker View Comments Washington – Federal authorities investigating Rudy Giuliani are seeking information related to a former U.S. ambassador to Ukraine who was ousted from her job two years ago on orders of then-President Donald Trump, a lawyer for Giuliani said Friday. Robert Costello confirmed via text message that a search warrant served this week on Giuliani made reference to Marie Yovanovitch, who as a central player in the first impeachment case against Trump detailed a smear campaign by Giuliani and other Trump allies that preceded her 2019 removal from the job. Costello said the warrant also referenced Ukraine’s former top prosecutor Yuri Lutsenko, who met with Giuliani and was also part of efforts to remove Yovanovitch from her position.