His sister Penny died of a drug overdose, which may have led him toward his career as a cop. He is an expert in English Literature who likes to read National Geographic on stakeouts.
Arthur stands 6'4", weighs 220, and scares people to death by his size. He is not scary at all to his wife Caroline and daughter Connie.
Racism crops up from time to time: Andy Parker gives him a hard time, as does the 83rd Precinct's Ollie Weeks. Brown bears it in good humor, safe and happy in the knowledge that he is a good, tenacious cop. Well-grounded and thoroughly likeable. Tenacious, anyone?