Question: Who directed 2008 American-Canadian horror film for which Scott Gordon Patterson is known? 
Context: Prom Night is a 2008 American-Canadian slasher film directed by Nelson McCormick that is a loose remake of the 1980 film "Prom Night".  The film stars an ensemble cast including Brittany Snow, Scott Porter, Jessica Stroup, Dana Davis, Collins Pennie, Kelly Blatz, James Ransone, Brianne Davis, Kellan Lutz, Mary Mara, Ming-Na Wen, Johnathon Schaech and Idris Elba.  A high school girl named Donna Keppel (Snow) is traumatized after witnessing her former teacher, Richard Fenton (Schaech), brutally murder her entire family after he had become dangerously obsessed with her.  Three years later, as Donna gets ready for her senior prom, Fenton escapes from custody, follows her to the hotel hosting the prom, and kills anybody who gets in the way of his reunion with Donna. I Am the Pretty Thing That Lives in the House is a 2016 American-Canadian horror film written and directed by Osgood Perkins.  It stars Ruth Wilson as a live-in nurse who suspects her elderly employer's house may be haunted.  It premiered at the 2016 Toronto International Film Festival and was released worldwide on Netflix on October 28. Jamie Scott Gordon is a Scottish actor and writer known for the 2013 horror film "Lord of Tears".  He is active with the theater project The Village Pub Theatre. Ogre is a 2008 American-Canadian television horror film directed by Steven R. Monroe.  In the story, a town is struck by a terrible plague.  The only means of preventing the plague seems to be to sacrifice one person every year to a vicious beast known as the Ogre. Saw IV is a 2007 American-Canadian horror film and the fourth installment in the "Saw" franchise.  It was directed by Darren Lynn Bousman and written by newcomers Marcus Dunstan, Patrick Melton, and Thomas Fenton.  It stars Tobin Bell, Scott Patterson, Costas Mandylor, Betsy Russell, and Lyriq Bent. The Unkindness of Ravens is a 2016 Scottish horror film that was directed by Lawrie Brewster.  The film stars Jamie Scott Gordon, who previously appeared in Brewster's 2013 debut horror film "Lord of Tears", as a veteran that comes face to face with demonic ravens.  The film had its world premiere on 27 August 2016 at the London FrightFest Film Festival.  Prior to its release the horror website Bloody Disgusting marked "The Unkindness of Ravens" as one of their "10 Must-See Independent Horror Films of 2016". Saw V is a 2008 American-Canadian horror film directed by David Hackl and written by Patrick Melton and Marcus Dunstan and stars Tobin Bell, Costas Mandylor, Scott Patterson, Betsy Russell, Mark Rolston, Julie Benz, Carlo Rota, and Meagan Good.  It is the fifth installment in the "Saw" franchise, and was released on October 23, 2008 in Australia and October 24, 2008 in North America. The Gate is a 1987 American-Canadian horror film directed by Tibor Takács and starring Stephen Dorff in his film debut.  Two young boys accidentally release a horde of demons from their backyard via a large hole.  The film was released on May 15, 1987, by New Century Vista Film Company.  Since its release, it has obtained a cult following and was followed by a sequel in 1990 titled "".  A 3D-remake directed by Alex Winter was in production; it was initially set for a release in 2011, but no release had occurred at that time. Scott Gordon Patterson (born September 11, 1958) is an American actor and musician.  He is known for his role as Luke Danes in "Gilmore Girls" and Agent Strahm in "Saw IV", "Saw V" and "Saw VI".  He also starred as Michael Buchanan in the NBC drama series "The Event" and as a Tenctonese alien commander in the TV film "". RoboDoc is a 2008 film that is distributed by National Lampoon.  The comedy was written by two medical doctors, brothers Doug and Scott Gordon M.D., and directed by Stephen Maddocks and co-produced by Donald Tynes.  Sleazy lawyers and heartless insurance companies are spoofed in this medical comedy.  The world premiere took place on Saturday May 10, 2008 at Hard Rock Live on the Universal City Walk.  The film was released in the Orlando Market on Friday September 26, 2008.
Answer: David Hackl