There seems besides witness testimonies to also be some video footage to back up allegations. Nowadays it is best to video tape everything.
An MP who was involved in last month's G20 protests in London is to call for an investigation into whether the police used agents provocateurs to incite the crowds.
Liberal Democrat Tom Brake says he saw what he believed to be two plain-clothes police officers go through a police cordon after presenting their ID cards.
Brake, who along with hundreds of others was corralled behind police lines near Bank tube station in the City of London on the day of the protests, says he was informed by people in the crowd that the men had been seen to throw bottles at the police and had encouraged others to do the same shortly before they passed through the cordon.
Brake, a member of the influential home affairs select committee, will raise the allegations when he gives evidence before parliament's joint committee on human rights on Tuesday.
http://www.guardian.co.uk/politics/2009 ... ovacateurs