I would say Santangelo would be more random than drunk/insane. But given that there are several cops on the show who could fall under the same bracket it's guesswork at best. Captain/N11 makes sense re: Arheiners ability.
Three gunshots, fired through the car window. As the alarms blasted, the hooded gunman ran without looking back. If he had done, he'd have seen that the cop wasn't even there. ~ He hadn't ever turned his gun on a man who wasn't in the game. Until tonight. The detective's last thought was that he really should have identified himself as an officer. Benny is dead. He was Roland 'Prez' Pryzbylewski. ~ Athlai has made the papers for being on public charge at the courthouse. He is Lester Freamon. ~ It is now Day 2.