Christina Caldwell, 58, and her sister Mary Caldwell, 70, were found stabbed to death in their Telegraph Hill apartment in San Francisco on February 20, 1985. The killings were described as brutal and prompted investigators to consider links with other violent attacks in the region.

Authorities soon suspected the murders were the work of Richard Ramirez, known as the Night Stalker.

Does anyone have memories of Telegraph Hill in early 1985 or information about the Caldwell sisters that could shed light on what happened?