A spokesman for Amy Winehouse says London police are no longer investigating the 24-year-old singer on suspicion of witness tampering in a case involving her husband.

The spokesman said Friday that Winehouse isn't required to return to a police station for further questioning. She was arrested in December and released on bail.

Her husband, Blake Fielder-Civil, appeared in a London court Friday on charges of attacking a pub landlord and later conspiring with him to withdraw as a witness at the trial. Fielder-Civil pleaded not guilty.
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