All things being equal, I don't think you can trust people who try to secretly spy on others so I see why they were fired. What did they think they were going

All things being equal, I don't think you can trust people who try to secretly spy on others so I see why they were fired. What did they think they were going to find with the listening devices? This sounds like the tactic of someone who is looking for a specific admission when they already have enough evidence to know something illegal is happening, but not how far up the hierarchy it goes.