Mark Kennedy, known as Mark Stone to the environmental activist group he infiltrated.
Media playback is unsupported on your device
Video

Undercover police officer Mark Kennedy outraged by report

The undercover police officer who infiltrated a group of environmental activists has told BBC Radio 5 live that a report into his actions has made him into a pariah.

The review by the Inspectorate of Constabulary found that Mark Kennedy, known to protesters as Mark Stone, "defied" instructions and was inadequately supervised.

His actions led to the collapse of a trial involving environmental protesters in 2011 but he told Victoria Derbyshire that everything he did was signed off.

To hear other 5 live interviews, please visit the best bits page.

Victoria Derbyshire broadcasts weekdays 10:00 to 12:00 on Radio 5 live.

  • 02 Feb 2012
Go to next video: Undercover officer 'defied' bosses