Detective Chief inspector Tony Heydon says the 30th anniversary of the murder of taxi driver John Landa is the perfect time for someone to come forward with a name so a conviction can be made.
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It's been revealed that more than 200 drivers have been caught each day by each of the new average speed cameras in Birmingham.
David Brickwood was killed at his home last year in what police believe was a pre-planned robbery.
Merlin, the operator of the park, has been told it should expect a "very large fine" for breaching health and safety.