Recently a documentary was made about the "Keddie murders," the unsolved and apparently random thrill killings of four people in northern California. The film was four years in the making and features interviews with family members, police and FBI agents, journalists, and witnesses. It is Cabin 28: The Keddie Murders, which came out three years ago. Interest in the documentary and the case itself is rejuvenated by a horror film released a few weeks ago, The Strangers (IMDB), which in turn is said to be loosely based on this case (and undoubtedly many others like it).
The case is named for the resort where a woman, two boys, and a girl lost their lives in a vicious and sustained assault. Studying the details at length might lead you to adopt a pit bull. The house is still standing today, though many will go on record with the San Francisco Chronicle declaring that the place is haunted, to the dismay of locals. Another familiar theme....
Something tells me there may be a book about the case after all these years.
Bonnie's Blog of Crime on the Keddie Murders
Steve Huff on the Keddie murders
The nicely done website for the documentary is at http://www.www.keddiemurdersfilm.com.