Abruf’s employment ended after three years, in 1986, after an assignment in 1985 raised suspicions. In that year, he was ordered to Coevorden, Ter Apel, and Vriezenveen, where he was told to locate military depots, and to Woensdrecht, where he was to photograph the deployment site. On 25 February 1986, the BVD paid him a visit and asked about the trip to Vriezenveen and about his contacts with the GDR embassy. The BVD had stumbled across Abruf while they were following Hilmar. At the time, Dutch security did not seem to know much about Abruf’s history and actual activities as an agent. Hilmar had already been replaced by an MfS case officer codenamed Haupt. The BVD visit alarmed both Abruf and the residentura, and the relationship was mutually terminated two days after the inquiry.