Michael Easton, from Holland Park is still missing following a trip on a crocodile infested river in India, which left a friend dead. Authorities are continuing to search the area around the Cauvery River near Bangalore. Ian Turton, from York, died during the excursion.
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The teenager's family spoke of their "torment and pain" after serial killer Levi Bellfield finally confessed to her murder.
The fatal collision happened in Hackney, east London, just before midday on Tuesday.
Police are hunting three youths in connection with the incident which happened on January 4 in Romford.