Roger Nolan is a former sergeant of the Baltimore Police Department

Baltimore Police Department

The Baltimore Police Department provides police services to the city of Baltimore, Maryland and was officially established by the Maryland Legislature on March 16, 1853...

's Homicide Unit. He is notable for appearing alongside Terry McLarney and Jay Landsman

Jay Landsman

The book was later developed into the television series Homicide: Life on the Street. He was the inspiration for the fictional character John Munch on that show and a character named Jay Landsman on the television series The Wire, created by Simon. Landsman portrayed himself in a brief appearance...

 as a Homicide Sergeant under the command of Lieutenant Gary D'Addario

Gary D'Addario

Gary D'Addario is a retired police commander, television technical advisor and actor from Baltimore, Maryland.D'Addario joined the Baltimore police department in 1967...

 whose Homicide unit was featured in David Simon

David Simon

David Simon is an American author, journalist, and a writer/producer of television series. He worked for the Baltimore Sun City Desk for twelve years. He wrote Homicide: A Year on the Killing Streets and co-wrote The Corner: A Year in the Life of an Inner-City Neighborhood with Ed Burns...

's Homicide: A Year on the Killing Streets

Homicide: A Year on the Killing Streets

Homicide: A Year on the Killing Streets is a 1991 book written by Baltimore Sun reporter David Simon describing a year spent with detectives from the Baltimore Police Department homicide squad...

book. A native of West Baltimore and a former Marine, Nolan joined the department in 1963 working in the State's Attorney's Unit, and the Western, Eastern, and Northwestern Districts before becoming a supervisor in the department's Homicide Unit.