In the letter, which was written in English, two retired Stasi officials and four other East German government officials were named, while the purported death squad was said to have consisted of three persons. The alleged motive behind the assassination was that Falck had received sensitive information about a secret weapons affair between the Swedish weapons manufacturer Bofors and East Germany. In the letter, Stasi was further blamed for the death of the Swedish weapons inspector Carl-Fredrik Algernon, the chief investigator of the Bofors scandal, in the Stockholm Metro in 1987. The letter claimed that it was Falck who had informed Algenon about weapons affair.
