The killing intent in Kieran's words were explicit.
A traitor was someone that could never be forgiven, especially when the traitor even received heroic treatment after his "death".
Everyone from St. Paolo thought that Reed accidentally bumped into the killer while he was on patrol alone and was killed after that. It was an extremely saddening incident to all including the elderly sister.
Initially, Kieran was tricked as well but as things unfolded before him, more and more clues pointed at Reed's death, stating that it wasn't as simple as it seemed.
Reed's death was too coincidental.
When Herles led many of his men to launch an assault on St. Paolo School, the school security captain Reed died and it wasn't at the hands of the Blood Hand Society.
