In May 2019, Mancow Muller claimed that MacDonald had, on two different occasions in 2018, asked Muller if he knew of a hitman for hire. Similarly, former Harvest bodyguard Emmanuel Bucur stated that MacDonald had asked him in 2015 to kill MacDonald's former son-in-law. Bucur and Muller reported their allegations to the police of their respective Illinois towns of Bartlett and Wilmette on May 18, 2019, and an investigation was commenced.
