Kishkumen is a follower of Paanchi. To preserve the life of his preferred leader, Kishkumen assassinates Pahoran. This is intended to throw the government into chaos and allow the uprising. In the turmoil, Paanchi would be able to be freed. The death of Pahoran would not have directly freed Paanchi, but a successful rebellion would. This is therefore them more probable cause of the death of Pahoran rather than an attack on those guarding Paanchi.
Variant: The original manuscript spells Kishkumen Kishcumen. The change to the “k” came in the printer’s manuscript.