Who was the director that directed both Jennifer Carpenter and Mattie Liptak? 
Mattie Liptak: Mattie Liptak (born April 10, 1996) is an American actor best known for his role as George in the horror film, "", a sequel to the 2008 film, "Quarantine". Quarantine (2008 film): Quarantine is a 2008 American found-footage horror film directed and co-written by John Erick Dowdle, produced by Sergio Aguero, Doug Davison, and Roy Lee, and co-written by Drew Dowdle, being a remake of the Spanish film "REC".
i don't know