The murder of an anti-racist protester in 1979 by a special unit of the Met Police was followed by a gruelling battle to win answers about what happened on that tragic day. Now material related to that campaign is available to the public and researchers for the first time at the Bishopsgate Institute. INDIANNA PURCELL reports

TONY COLLINS looks at the evidence he has uncovered in his research on our early labour movement of deep and hostile police infiltration that ruined lives in the last century

TIM DAWSON looks at how obsessive police surveillance of journalists undermines the very essence of democracy

LINDSEY GERMAN argues that the interim report on undercover policing shows the Metropolitan Police is not fit for purpose

In an exclusive investigation, BETHANY RIELLY looks at how the state targeted leading politicians and campaigning groups — labelling many well-known figures 'extremists' and 'subversives' for attempting to hold the police to account

JAMIE JOHNSON recommends an ultimately depressing and haunting book that is a damning criticism of our society

With undercover policing under the spotlight, these operations will continue with extra efforts to hide them from public scrutiny writes NICK WRIGHT

Animal rights activist Daryl Dixon speaks to the Star after discovering his friend in the 1980s was an undercover copper