[8] In February 2007, the Adamawa State House of Assembly served Boni Haruna with an impeachment notice for alleged gross misconduct and for inability to perform the functions of office as demanded by the 1999 constitution.
[12] In August 2008, he was arrested by the Economic and Financial Crimes Commission headed by Farida Waziri over allegations of corruption while serving as governor of the State between 1999 and 2007.
[13][14] In November 2008, an Abuja Federal High Court granted Haruna leave to travel to the United States for medical treatment, adjourning the case until February 2009 for the accused to take a fresh plea following the EFCC's amended charges.
[15] In May 2009, Boni Haruna was re-arraigned by the Federal Government over alleged money laundering involving N100 million, after the discovery of new evidence related to his period in office as the governor of Adamawa State.
[16] In August 2009, the Economic and Financial Crimes Commission (EFCC) brought a 28-count charge against Boni Haruna for forgery and illegal movement of about N150m to an unknown destination.