Tim had decided almost right away that he was going to treat the game as a training exercise. That mean, among other things, an excuse to get professional -- read: obsessive -- about it. As soon as he'd looked up Fenris' apartment in the directory, he'd scavenged the parts from a webcam and rigged up a motion sensor aimed at the front door. Every time it opened, he got an alert on his phone.

That meant that when Fenris went on the hunt, Tim knew about it in time to look out his front window over the courtyard and spot him moving away from the apartment. Following casually was a simple next step.