Why Did You Kill All the Witnesses?

"There's a really big switch that happens that even Jackson can't explain," he says. "If you've already agreed, I'm not going to kill Mary ... adding the mailman to the equation really should not lead you to kill him." Ralph Stokes had forgotten his wallet and gave it to Eric Burley who was trying to mediate between them. The two men then went over to some random guy's house where they started talking about their robbery.