CCTV footage of Andrew Mitchell leaving Downing Street was broadcast by Channel 4 News.
The CPS, who charged one officer with misconduct in a public office today, said they looked at "previously unseen and unedited CCTV" footage and concluded there was not enough evidence to "show that the officer at the (Downing Street) gate lied in his account".
PC Keith Wallis has been charged for allegedly sending an email to his MP but it is claimed he did not witness the exchange between Mr Mitchell and police officers at the gate.
Andrew Mitchell says he has been "stitched-up" by police whilst one officer was charged with misconduct in relation to the ongoing scandal.
Today's charges come more than a year after the events that led to the end of Mr Mitchell's career. Here is what has happened since.