article_snippet: Two men are being questioned by police after a retired corrections officer fatally shot a 32-year-old man at a Brooklyn subway station following an argument during rush hour, authorities said.
article_snippet: Two other men, Drogheo's 29-year-old friend and the retired corrections officer, who is 69, were taken into custody on Tuesday night and were being questioned on Wednesday, police said.
article_snippet: Police told the New York Times that the argument began when the ex-officer, who was armed with a 9-millimeter handgun, stepped between the two friends as the two friends had a conversation on the train.
article_snippet: Rush hour shooting: A 32-year-old man was fatally shot by a retired corrections officer during the shooting .
article_snippet: The former corrections officer, who has not been named, remained at the scene and was taken by police to Long Island College Hospital for treatment.
article_snippet: Police say the circumstances of the shooting were still being investigated.
highlights_snippet: Police said The ex-officer had been carrying a 9-millimeter handgun .
  
highlights_snippet: Both The ex-officer and Drogheo's friend, 29, were being questioned on Wednesday .