Google is gearing up an effort to digitize old newspapers, as it announced recently on its official blog. As it reports, "Over time, as we scan more articles and our index grows, we'll also start blending these archives into our main search results so that when you search Google.com, you'll be searching the full text of these newspapers as well."
Meanwhile, the Library of Congress has digitized many newspapers from 1890 to 1910 and will continue adding years of coverage in the future. That span covers quite a few legal matters of interest to true crime buffs (Lizzie Borden, for one).
I won't be giving up my subscription to Newspaperarchive.com any time soon, but these newest and growing resources will add to our ability to peek at pages of the past for whatever bloody subject interests us.