The beginning of the end started with Emily stealing back the Shamu-cam from Tyler. This is the same cam that contained all of that incriminating footage Tyler was so keen on having. In her investigation, Emily discovered that Tyler had a brother in San Francisco.
The brother was on his way, but not before Tyler could stir up some trouble. Nolan was confronted by a knife-wielding Tyler when he arrived home the night of Daniel’s party. The clearly unstable Mr. Barrol demanded all copies of the videos on the whale-cam, which just happened to be on the mantle at Emily’s house. Tyler cuts Nolan’s arm, then watched Emily place her gun in her desk from the whale-cam playing on Nolan’s laptop. He needed to pay Emily a little visit, but not before tying up a wounded Nolan.