Representatives from police forces across the UK attend the Care of Police Survivors Annual Service of Remembrance at the National Memorial Arboretum at Alrewas in Staffordshire.
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A 17-year-old boy has been found guilty of murder after a 22-year-old man was stabbed to death in Bartley Green last year.
The woman was attacked and raped in a residential area of Ilkeston in Derbyshire.
CCTV police hope could help provide vital information to solve a murder investigation has been released by detectives.