Apparently a large amount of produced liquorice goes to flavor cigarettes, up to 4% of the weight of a cigarette's tobacco blend is liquorice[0]. So I would wager that smoking liquorice has killed more people than eating it (not that that tidbit of info helps in the case of the man in the article).
[0] https://www.dkfz.de/de/tabakkontrolle/download/PITOC/PITOC_T...