John Mahoney, Minority Leader of the House and Joe DeMarco<U+2019>s longtime employer, has kept more than one secret from his wife over the years, but none so explosive as this: He has a son, and that son has just been shot dead in a bar in Manhattan. Mahoney immediately dispatches DeMarco to New York to assist prosecutor Justine Porter, but with five bystanders willing to testify against the rich-kid killer, the case seems like a slam-dunk. That is, until Porter begins to suspect that someone is interfering with those witnesses, and that this may be connected to a pattern of cases across the country. Is someone getting witnesses out of the way when the fate of a wealthy defendant is on the line? With the help of Porter<U+2019>s intern, as outrageously smart as she is young, veteran DC fixer DeMarco becomes determined to follow that question through to its violent resolution in House Witness.