The corpses of the de Witt brothers

A rather bleak painting ascribed to Jan de Baen, depicting a famous historical event in Dutch history (full title: The corpses of the de Witt brothers, Jan and Cornelis, hanging on the Groene Zoodje on the Vijverberg).

I can't figure out what the figure in the lower right corner is supposed to be doing.

Via La Muse Verte.