Former HSBC private banking boss said he was unaware of tax evasion . He is now under investigation by the US Department of Justice over his role in a scheme to help wealthy clients evade taxes.
Former HSBC private banking boss said he was unaware of tax evasion . Chief executive Stuart Gulliver and Rona Fairhead also angered MPs . BBC Trust chairman was either 'incompetent ' or aware of wrongdoing .