Conversation so far:
when did Yagan die?
When the party of settlers arrived, they found Yagan dead and Heegan dying.
what year was this?
1833.
how did he die?
William Keates shot Yagan, and James shot Heegan, another native, in the act of throwing his spear.
why was he killed?
the brothers decided to kill the warrior and claim the reward.
When the natives were ready to depart, the Keateses took their last opportunity.
what was the reward?
CANNOTANSWER.

Question: who else was involved in his death?
Self-contained rewrite: Besides Yagan's brother's, who else was involved in Yagan's death?