Relentless

Vincent comes home to reconnect with Jeff and the rest of the family, but is met with a lot of skepticism and wariness. After all, Jeff is a serial killer, and who knows what Vincent's intentions are.
As the family learns to trust Vincent, he and Jeff begin to plot together, planning their next killing spree. After all, Vincent has been envious of Jeff for a long time, and sees this as a way to finally surpass his brother.