In a courtroom in eastern Iowa on Jan. 31, a man who has been William Woods for his entire life faced a man who had been known as William Woods for much of his. It was not until the real Mr. Woods contacted the University of Iowa, where Matthew Keirans was employed in Mr. Woods’ name, that he found an investigator who took him seriously enough to find the truth. Keirans was sentenced to 12 years in prison, ending a yearlong identity theft ordeal.