Please see, among other reports:

Former Libor ‘Ringmaster’ Hayes Gets 14 Years for Libor Rigging

N.B.:
‘As part of his defence Hayes asserted that top management knew exactly what he was doing. Hayes told the jury: “Everything I did was with complete transparency. Everything I did my managers knew about . . . sometimes going up all the way to the CEO.” [Emphasis added.]‘ See further here.