Del. Code tit. 11, § 1431

In any prosecution for a gambling offense, evidence that a police officer, when making an arrest for a gambling offense, received or overheard telephone messages intended for the accused or an associate of the accused which tend to prove that gambling activity was being conducted is admissible. The gathering and disclosure of such evidence, including the contents of the telephone messages received or overheard, does not violate any law of this State.