Amy Winehouse Off the Hook in Perversion of Justice Case

02/29/2008 at 11:45 AM EST

Amy Winehouse is off the hook, police in London said Thursday.

Authorities have decided not to take further action against the Grammy-winning "Rehab" singer in connection with the ongoing investigation into an alleged attempt to pervert justice.

In Deecmeber, Winehouse was arrested, and later released, in connection with an alleged plan to derail a criminal case against her husband, Blake Fielder-Civil. The singer was due to return to the police station, but will now no longer be required to do so.

"Amy is pleased to be discounted from the investigation and thanks the police for their professionalism in their dealings with her," he rep, Tracey Miller said in a statement.

Police have confirmed that Winehouse is no longer a suspect in the case, her rep added.

The case relates to a witness-tampering charge for Winehouse's jailed husband, who is accused of assaulting a barman in June. On Friday, Fielder-Civil plead not guilty to charges stemming from the pub brawl. Winehouse was not present in court.