[8] A royal charter from 1228 confirmed that Simon, along with Peter, son of Töre, played a decisive role in the murder of Queen Gertrude of Merania in September 1213.
After the return of Andrew II of Hungary from Halychina, only Peter was executed by impalement, the Kacsics clan could retain their estates and influence yet, due to political circumstances and the King's lack of internal support.
Accordingly, Simon lost his lands and villages in Transylvania, including Marosvécs Castle (today in Brâncovenești, Romania), Széplak and Gyeke in Kolozs County (present-day Goreni and Geaca in Romania, respectively) and plausibly the lordship of Losonc in Nógrád County (today Lučenec, Slovakia), which were granted by Denis Tomaj and his clan (ancestors of the Bánffy de Losonc family).
[9] The land confiscation in 1228 might be a sign of the subsequent retaliation after an increased role in national politics by princes Béla and Coloman since the early 1220s, as historian Gyula Pauler argued.
[8] Historian Tamás Körmendi argued, it is quite unrealistic that Andrew II appointed Simon to baronial dignities after the murder, even his few opportunities for punish the perpetrators, as Pauler had claimed.
Although, Simon did not longer hold any offices after 1221, he probably remained influential due to his extensive possession of Széplak, which covered the region of Szászrégen (today Reghin, Romania) to the Halychinan border, which could cause a political showdown.