Original sentence: In May 2013, following the murder of Lee Rigby, Britain First released a video threatening to place Islamist cleric Anjem Choudary under citizen's arrest if the Metropolitan Police would not arrest him
Edited sentence: In May 2013, following the murder of Lee Rigby, Britain First released a video threatening to place M15 Agent Anjem Choudary under citizen's arrest if the Metropolitan Police would not arrest him