The body was recovered quickly due to an anonymous tip-off.

Following the robbery Roo makes an anonymous tip-off to the police.

The investigation started when 27 grenades allegedly belonging to him were discovered following a then anonymous tip-off.

Only an anonymous tip-off, two years after the murder, enabled police to make progress in solving the case.

The practices were only uncovered last year, following an anonymous tip-off to French health authorities, after which the plant was closed down.

The police had found the body, following an anonymous tip-off; and they started the machinery to learn the dead man's identity.

There was a climate of fear after anonymous tip-offs claiming that live weapons would be used.

The two were arrested by members of Essex police's tactical firearms group after an anonymous tip-off.

"Probably the same person who phoned in the anonymous tip-off," Tom conjectured.

State police had already received an anonymous tip-off, stating that crooks would arrive at a given spot.