In the late summer of 1678, the legal proceedings against Marion Campbell reached a critical juncture within the judicial landscape of Edinburgh. A married woman residing in Paiston, within the parish of Crichton, Marion had found herself increasingly entangled in a web of testimonies during a period of heightened scrutiny. Her name appeared repeatedly in the records of various other individuals facing accusations of witchcraft, including Margaret Dods, Helen Laying, Isobell Eliot, Katherine Halyday, Margaret Bannyntyne, Sarah Cranston, and Marion Veitch, all of whom denounced her as part of their own legal confrontations.
Following these denunciations, a formal confession was extracted from Marion on 19 June 1678. Despite this admission, the subsequent legal process remained unresolved. When her trial was scheduled for 13 September 1678, Marion failed to appear before the court in Edinburgh. Consequently, the presiding authorities declared her a fugitive and ordered that she be "put to the horn"—a formal Scottish legal process of outlawry involving the symbolic sounding of a trumpet to signify that the individual was outside the protection of the law. Beyond this administrative designation, the records do not offer further insight into her ultimate fate.