Not a lot of info about Arlis Perry out there. If you want to read more about it and other so-called cult (The Process) murders I recommend The Ultimate Evil by Maury Terry, who supposedly links Arlis's murder to the Son of Sam and Tate/LaBianca butchery. You can buy it on amazon.com.
This from Wiki:
Arlis Perry, a newlywed 19-year-old North Dakota native, was killed in Stanford Memorial Church on the grounds of Stanford University on October 12, 1974. Her murder remains unsolved as of late 2009.
She was found murdered with an ice pick in the church in the early morning hours of October 13, 1974. Perry was sexually assaulted with altar candles.
David Berkowitz, the notorious "Son of Sam" killer from New York City, mentioned the Perry murder in a few letters, suggesting that he heard details of the crime from "Manson II", the culprit. In the San Jose Mercury News, Jessie Seyfer noted that "investigators interviewed [Berkowitz] in prison and now believe he has nothing of value to offer" regarding the Perry case.
Her murder is notable because she is among a small but important genre of murders, which is women killed at elite universities, possibly by known or inside assailants. A second notable slaying in this category was that of Annie Le at Yale in September, 2009.