Kyle Butler is one of two minor characters who only appear while Arthur is searching for Dexter Morgan. He is the Kyle Butler that actually evades Trinity's wrath.
While Arthur Mitchell is hunting down "Kyle Butler," he finds two people with those names in a local phone book and goes after them. When Dexter learns the name of a body is Kyle Butler, he realizes that Arthur is looking for him.
Dexter subdues the next Kyle Butler in the phone book so that he can ambush Arthur when he arrives. However, when Arthur breaks into Kyle's apartment, he sees the latter's picture on a Christmas card and leaves, knowing that he is not the right person.