Who is David McConnell from Black Cross and what is their importance? Black_Cross_(novel) English & Literature David McConnell | Black Cross

David is Mark McConnell's brother who is enlisted as a Captain in the United States Air Force. He met with Mark and told him that he should help create the duplicate of Sarin gas for the British because his men needed something like that in order to win the war. It is David's death that sparks Mark into action on the mission to attack Totenhausen Camp.