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 Police Federation chairman said officers were often "letting someone off with a warning and hoping for the best".
A total of 21 are also injured by a blaze which ripped through the upmarket 22-storey hotel on the Black Sea coast.