The damage was already done long ago. Maybe he knew more but more likely they just waited an appropriate amount of time. I.e. - revenge killing, not suppressing the next story
or he's just being put in witness protection / protective custody or given access to the off-planet paradise retirement community that all these ppl on either side eventually get admittance to
Why kill him now though? What else did he know?
The damage was already done long ago. Maybe he knew more but more likely they just waited an appropriate amount of time. I.e. - revenge killing, not suppressing the next story
or he's just being put in witness protection / protective custody or given access to the off-planet paradise retirement community that all these ppl on either side eventually get admittance to