Jared was among those killed in the attack. The Sole Survivor later attacked the Corvega plant at the request of the residents at one of the settlements that the gang was menacing. The Sole Survivor intervened, killing Gristle's raiders and rescuing the Quincy survivors.
Gristle's raiders successfully trapped the caravan in Concord's Museum of Freedom, however, Garvey managed to call out to a passing traveler, the Sole Survivor of Vault 111, asking them for help. This woman was indeed Mama Murphy, who was traveling with Preston Garvey and the other survivors of the Quincy Massacre, searching for a spot to start rebuilding their lives. When Gristle informed him of an elderly woman traveling with a caravan, Jared sent his lieutenant after them, certain that she was the fortune teller. I then started the mission to clear the Corvega assembly plant I cleared the outside of the plant with a sniper rifle filled my inventory with loot and ran back to drop it off. I started a new game completed a couple of quests and collected four fusion cores and stashed them away for later. He even began recruiting new members by enticing them with free chems, in order to experiment on them. Fallout Fusion Cores in the Corvega assembly plant.