The Witch of Watergate — Warren Adler

Fiona FitzGerald, senator's daughter turned Washington, D.C., homicide detective, is called in to investigate a murder with explosive consequences on Capitol Hill. An infamous Washing Post reporter whose poison pen has destroyed many a politician's career if found hanging in her Watergate apartment. “The Witch of Watergate” is dead! Although suicide for this lonely and miserable woman seems the logical conclusion, Fiona is determined to find the truth.