How undercover police solved 1984 murder of civil servant

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Just after midnight on 1 May 1984, civil servant Anthony Littler stepped off a train at East Finchley station and set off down a dark alleyway towards home. Two minutes later, the 45-year-old lay dying on the ground. For 42 years, nobody was brought to justice. Detectives turned to a daring undercover operation. Now, that has changed. Michael Stewart, 57, and Anthony Stewart, 60, were sentenced at the Old Bailey to life imprisonment with a minimum term of 10 years and 15 years respectively for his murder. The brothers were aged 15 and 18 at the time of the attack. BBC London's Guy Lynn has the story.