"The offences we are looking at basically amount to the financial abuse of the most vulnerable members of our society. The evidence would suggest that these vulnerable people have been groomed and then preyed upon by a group whose sole intention appears to be to line their own pockets.”
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John Cantlie, who worked for a number of Fleet Street newspapers, is thought to have been taken hostage in November 2012.
The union published a 'no show' league table for last year the worst offenders for cancellations.
Zalkalns was jailed in his native Latvia for eight years in 1988 after he admitted killing his wife with a piece of electrical equipment.