Robb brings a captive Jaime with his camp as they march through the Westerlands, as Robb fears Tywin may coerce one of his bannerman into freeing Jaime. At one point Jaime attempts to escape by beating his cousin and fellow inmate Alton Lannister to death and strangling his guard Torrhen Karstark when he comes to investigate. Jaime is soon recaptured by Robb's bannermen, but the anger of Torrhen's father Rickard proves fatal for Robb's campaign in the coming months. After Jaime goads Catelyn by mentioning Ned's rumoured infidelity, she releases him and has Brienne of Tarth escort him to King's Landing to trade for her daughters, Sansa and Arya.