William Graham, the son of Washington Post publisher Katharine Graham, committed suicide in Los Angeles, California, on December 20.: William Graham, the son of Washington Post publisher Katharine Graham, committed suicide in Los Angeles, California, on December 20 in a death that mirrored his father's more than 50 years ago. Graham, a 69-year-old lawyer, taught trial law at the University of California at Los Angeles before years of focusing on philanthropic activities to benefit youth education and medical research, according to The Washington Post.