The lengthy investigation into allegations of inappropriate behavior made against Christian Horner has concluded ... with the Red Bull team principal officially cleared of any wrongdoing.
The Formula 1 giant confirmed the findings of the probe on Wednesday ... saying it is "confident" the inquiry was handled in the most "fair, rigorous and impartial" manner.
Red Bull -- the six-time constructors' champion -- launched the investigation earlier this month ... although the nature of the allegations was never made public.