Impressions and Ideas about Marguerite and the end of Libra

In the final chapter of Libra, we find Lee's mother Marguerite heart-broken over her son's death as well as the entire situation leading to the event, such that she claims that Lee must have been manipulated by others to assassinate Kennedy. To Marguerite, as she explains to Chief Justice Warren, the idea that Lee was raised in a proper and loving home and is a good person at heart collides with the idea that he could have possibly chosen to commit an act as atrocious as shooting and killing the president. Therefore, the act does not fit with her world view and she refuses to accept the lone shooter idea, ergo believing in the conspiracy that Lee was manipulated and convinced to carry out his actions and was killed in an effort to erase evidence.

This theory seems to be much easier to understand and more comforting, that Lee was not alone when he acted, since the idea that someone such as Lee, a man living on the margins of society, could possibly gain access to shooting the president. If the CIA, mafia, or larger organization were to have employed a radical such as Lee and aided him by successfully putting him in a position to shoot the president while also destroying any of his links to them, it seems as something more credible to us. Also, as Delillo notes, many aspects of the plan were left to chance, an idea impossible to accept since we already see a conspiracy acting and many other coincidences not related to said plot occur altogether, we are pushed to accept a larger conspiracy occurring.