Ransone then went on to star in the 2012 horror film Sinister in the supporting role of Deputy So-and-So. In June 2014, Ransone joined the cast of Ti West's Western film In a Valley of Violence. In 2015, he had a co-starring role in the comedy-drama film Tangerine, reuniting him with Director Sean S. Baker. Following the success of Sinister, Ransone returned to appear in the 2015 sequel Sinister 2, reprising his role from the first film but now as the main character. In 2016, Ransone starred in the Amazon Studios police procedural drama series Bosch as Eddie Arceneaux.