John F. Kennedy was assassinated in Dallas by Mafia contract killers hired by Louisiana mob boss Carlos Marcello. Longtime local district attorney Henry Wade, an LBJ crony who would have sole jurisdiction over the prosecution of those responsible, had been corrupted by the local Civello crime family. Lyndon B. Johnson, while a US senator during the 1950s, had accepted bribes from the same mobsters so that they could avoid deportation.

With incredible detail and documentation, Mark North pieces the puzzle together to reveal how, in late 1961, US Attorney General Robert Kennedy and his brother John, who hated LBJ, initiated a covert Organized Crime Task Force investigation of the Civello mob in Dallas. Johnson, through Wade and local federal officials he had placed in power, learned of the plan and cooperated with the Civello mob to have JFK killed. Johnson did this, in part, because he had the power to control any subsequent federal investigation via FBI director J. Edgar Hoover. After the Mafia killed JFK, Johnson stopped Robert Kennedy's prosecution of the Dallas Mafia.
Betrayal in Dallas is unlike any book written on the JFK assassination. Because its conclusions are based on classified federal documents unknown to the public and research community, it will startle and convince all those who read it. Betrayal in Dallas is what the American people have been waiting for since November 22, 1963.