Complex sentence: Charles Alexander Moose (born 1953) is an American author and retired police officer, best known for his role as the primary official in charge of the efforts to apprehend the Beltway snipers in October 2002.
Split into simpler sentences: Charles Alexander Moose (born 1953) is an American author and former policeman. He is best known for his role as being the primary official in charge of the efforts to apprehend the Beltway snipers in October 2002.