Question: why was ezra in ravenswood?
Answer: As for why Ezra was even in Ravenswood at all, Marlene added, "I think he followed the trail of Ali, I think Ali went to Ravenswood first and Ezra was following her trail." So there you have it, Ezra was following Ali around to get fodder for his book and just happened to be dressed like a psychopath at the same time.