Police officers are understood to be at a number of properties in Writtle belonging to members of Peter Reeve's family.
The media have been asked not to approach them as they are described as distressed and possible witnesses.
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The lawyers are said to have known their clients were members of the Shia militia and not "the innocent bystanders" that was later claimed.
Matthew Rees said the moment he helped David Wyeth cross the finish line of the London Marathon will "live with him forever".
A cold northerly wind sweeps patchy rain and showers in across the UK today - particularly affecting northern areas.