Metropolitan Police Commissioner Bernard Hogan-Howe today said the force would launch "a ruthless search for the truth" in the Andrew Mitchell "plebgate" row.
Britain's most senior police officer has promised a "ruthless" investigation into an alleged conspiracy against Andrew Mitchell.
Andrew Mitchell has written a piece in which he has accused the police of trying to destroy his career in a smear campaign.
Police investigating the row involving Andrew Mitchell have arrested a second man today. See how the "plebgate" events unfolded.