Why is Sonny in Homicide instead of narcotics like at the end of the first game? Because Dooley is now head of narcotics and Sonny doesn't want to be under his thumb as a detective as he was as a patrol man.
There's also the fact that Sonny's narcotics assignment was only temporary to begin with.
Yes but the fact that he didn't want to stay in Narcotics means Dooley was promoted between games and that's the reason.
