The man leading the investigation into the disappearance of York chef Claudia Lawrence, almost seven years ago, says it has been compromised by people refusing to help the police.
Detectives believe Claudia was murdered.
Last night it was revealed the Crown Prosecution Service has decided not to bring charges against four men arrested last year.
Police say they won't give up on finding answers.
Detective Superintendent Dai Malyn:
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All the news and results from a dramatic election night.
Martin Stew gives us his take on the Exit Poll.
The Tories are predicted to win 368 seats - a majority of 86 - while Labour tumble to 191 seats, their worst result in modern history.