Elizabeth Kline was an activist in Erie, Pennsylvania in the 1950s-70s. She was married to Jeremiah Matteson and mother to Henry Matteson. After being falsely accused of conspiring with Jeremiah to kill a white man, she and Henry moved to Sharon, Pennsylvania, where she gave Henry the tools to begin hunting Jeremiah.
Elizabeth grew up in Erie, Pennsylvania, in the mid-twentieth century. She was involved in political activism and had some connection to the Black Panthers. She was already a known activist when she met Jeremiah in the late 1950s, and drew him into her work and community. They were married in 1961, and had their only son, Henry, in 1963.
When Jeremiah killed a door-to-door salesman in 1974 and vanished, Elizabeth was accused of conspiring with Jeremiah in the death. She was ultimately found not guilty, but the ordeal made her a target and a liability to her community, so she and Henry moved south to Sharon. There, she built a library in their basement to house Jeremiah's books on the supernatural as a gift to Henry, which he then began to use to hunt and attack Jeremiah. While Elizabeth was not initially active in or aware of Henry's activities, when she was made aware of them, she showed no interest in stopping him.