Even when he had by no means completed anything (and he has!), Andrew Kevin Walker will all the time be remembered because the screenwriter behind David Fincher’s “Se7en,” essentially the most iconic serial killer procedural of the ’90s that isn’t “The Silence of the Lambs.” Walker’s output since has various when it comes to high quality and scope: his script for Tim Burton’s Gothic masterpiece “Sleepy Hole” felt like a aware embrace of extra elegant, much less inherently scuzzy materials, extra Hammer Horror than Grand Guignol, whilst his Joel Schumacher-directed snuff thriller “8mm” retreated into outdated, nasty habits.