Elijah was making a rounds before going to bed. The upper crust liked that he walk by, it made them feel safer that there weren't 'undesirable types' hanging around. He would certainly never arrest someone for being outside a fancy house though. Of course, when someone was acting quite suspicious, he would have to check up on it. He saw the strange figure and walked towards him.

"Hey! Who goes there?" He asked, slowly jogging to get closer. He didn't want the man to think he was automatically going to grab him or anything. If people feel in danger they get defensive out of fear.