A single tree, growing in a natural dip along Hadrian's Wall in Northumberland, is destroyed overnight, and a community is left reeling. Who chopped down the tree at Sycamore Gap and why?

Primary school teacher Sabina Nessa was killed at random by a man with a history of violence.

Sir David Amess MP was murdered by an IS fanatic, at a meeting in a church in Southend-On-Sea in Essex, UK.

This is the story of a dangerous MI5 agent, which the government tried to keep secret.

Rikki Neave left for school but never came home. Decades on his killer has been jailed.

Logan Mwangi was five years old when he was murdered by the people he trusted.