Jane met a young Redjohn in the carnival, with a tattoo on his left arm. Redjohn runs to the carnival after killing 2 dudes on the Visualise farm. Bret Stiles once told Patrick that he knew his father, Alex Jane. Bret Stiles knows Redjohn. Redjohn knew Alex Jane. (Rosalynd Harker is the dying girl Patrick cons with his father)
Patrick knows Bret Stiles is Redjohn's father now. That's his leverage. Jason Cooper once said "The police never took reports from Visualise seriously. (25 years ago)" Visualise make the "Tiger, Tiger" group to combat this problem. Redjohn grows up to become the leader.
Brett Partridge is what Redjohn called himself after taking over "Tiger, Tiger."
Brett = Son of Bret Stiles
Partridge = "Tiger, Tiger," he's a big William Blake fan
So, Patrick plans to lure out Redjohn, by threatening to kill his father Bret Stiles next episode.