Take Matter Into Your Own Hands
Sometimes when someone is being unfaithful in a relationship, they will start leaving little trails behind them of their actions. And whilst this might not always be the case, people can often tell when something is slightly off with their partner, considering they live with them and see them every day.
When this man became suspicious of his wife, he decided that he was going to take matters into his own hands and catch her in the act. But instead of physically confronting her without evidence, he decided to install a voice-activated digital recorder in her car and was able to find exactly what he was looking for.