Jake on Graysmith

From a NZ website (bloody Kiwisi):

His next film is Zodiac, about a 1960s San Francisco serial killer. Gyllenhaal is playing Robert Graysmith, the San Francisco Chronicle ex-illustrator and author who obsessively investigates the killings. Gyllenhaal's starting to get a little forensic himself; he's been recently videotaping Graysmith. What's he like? " He's a bulldog and at the same time, full of an innocence I could never equate with a bulldog. He cares about doing the right thing in a world that seems so perverse, it seems impossible to do the right thing in. "I've noticed that playing a real person, you can interpret it how you wanna interpret it, but sometimes the personality is the key to making the story work."