 Over the years, Rex parlays his street smarts and shady connections into a sideline career as an amateur private investigator.In occasionally aiding the police, Rex develops a friendship with Police Commissioner Bo Buchanan, who is constantly frustrated by Rex's mischief and methods but cares about him like a son.In 2006, Rex becomes romantically involved with Adriana Cramer, whose mother Dorian Lord disapproves of the match and goes to great lengths to keep them apart.