You have once again found a friend! This time was Nelson, who kind of... just stares at you... A man of few words, indeed.
You wait around for a minute, hoping something might happen, but it's all just silence. As you step away to leave, Nelson walks over to you. he whispers into your ear, "My name is not Walter. I am Nelson. Please take this," and hands you a badge. Now knowing the dog's true identity, you wear it with pride.
The badge has been added to your inventory!
Let's go home.