We recently had an issue between two employees. As one was privately discussing the issue with his manager the other was caught in a storage room eavesdropping on the conversation.This employee is also in management type position and the other employ

We recently had an issue between two employees. As one was privately discussing the issue with his manager the other was caught in a storage room eavesdropping on the conversation.This employee is also in management type position and the other employee now worries about retribution. Recommendations please?