It was a warm, still, July summer night in 2014, when an 85-year-old woman, a beloved grandmother and neighbor, was viciously murdered by someone who slipped quietly into her bedroom and slit her throat and watched her bleed to death in less than a minute. Who committed this awful murder, how, and why? The perpetrator of this horrible crime was the woman's own grandson, an adored and trusted family member. He was married and also had four children of his own. James W. Marquart walks us through the investigation involving the collection of evidence in Texas and in Illinois, the arrest, trial, conviction, and the punishment of the killer who committed this crime for money and pure lust. Punch your ticket to a front row seat and see how murder cases unfold and murderers are caught and punished. In Unthinkable: Who Kills Their Grandmother? by James W. Marquart we experience a gripping account on why the murder occurred and how this crime by a family member has impacted the lives of other close family members. In a weird twist of fate, the author continues to live in the house that belonged to the killer.