In a medium bowl, whisk together the chocolate pudding mix with 2 cups cold milk until evenly dissolved. Set aside.
In a separate bowl, whisk together the butterscotch pudding mix with 2 cups cold milk until evenly combined. Set aside.
In another bowl, combine the graham cracker crumbs with the melted butter and stir until moistened. Divide the graham cracker crumbs among 6 to 8 small plastic cups or tumblers. Spoon in the butterscotch pudding, evenly among each and then add the chocolate pudding on top of that. Finish off with a layer of the crushed chocolate cookie crumbs.
Using melted chocolate in a sandwich bag, with a corner snipped off, decorate vanilla sandwich cookies with "RIP" to look like tombstones and then place in the center of each parfait. Allow to chill for at least 1 hour before serving. Keep in fridge until ready to eat.