In the previous half of the two-part season opener, the BAU identified the Unsub (Wallace) but mistakenly arrested his twin brother (Jesse) instead. Faced with a pending lawsuit by the innocent brother, the team scrambled to hunt down the killer. Wallace (the Unsub) went to his house, only to be knocked by Jesse. After Jesse restrains his brother, he breaks into a woman's home and rapes and shoots her. The brothers decided to stay together, and after raping and killing one of Jesse's neighbours, they decide to meet their mother at a church. Their mother hugs Wallace, while urging Jesse to kill him. Jesse instead threatens his mother with a cleaver, while Wallace picks up a gun and demands that he stop. The mother then encourages Wallace to kill Jesse, a struggle ensues, and one of the brothers is shot dead, just as the BAU arrives. The team asks the twins' father to identify the surviving brother - which he does after noticing the twin's abnormal hand twitch.