Answer:
Independent source exception
Step-by-step explanation:
It is an exemption to the exclusionary rule.
In the law of the United States, this convention applies to evidences that are at first found during, or as a result of, an illegal search, but later on are obtained autonomously from the exercises that are unaffected by the underlying lawlessness.
It was observed that, in the doctrine of independent source, witness has the right and usually come forward with the proof on their own will.