sentences:  ("See above").During the investigations concerning the secret files scandal and P-26, Herbert Alboth, a former member of staff of the Spezialdienst (special service) until 1976, was assassinated on April 18, 1990, in his flat in Liebefeld near Bern.A short time before, he had written to the MP Kaspar Villiger, on March 1, proposing to reveal all that he knew on the stay-behind.