Meaning of informer

1. The informer provided crucial information to the police that led to the arrest of the criminal.
2. The informer's identity was kept secret to protect them from retaliation.
3. The informer was paid a large sum of money for their valuable intelligence.
4. The informer had to go into hiding after their cover was blown.
5. The informer was praised for their bravery in coming forward with the information.
6. The informer's tip led to the successful bust of a drug trafficking ring.
7. The informer's testimony in court helped to convict the corrupt politician.
8. The informer wore a wire to record incriminating conversations.
9. The informer's family was relocated for their safety after their cooperation with authorities.
10. The informer's credibility was questioned by defense attorneys during the trial.