Are you saying that there was truth in what he was saying and investigating?
I mean, if it was just foolish babbling, it would be better to let him alive, wouldn't it?
Only you can draw such correlation. Ukraine charged him for mass use of banned chemical weapons, he was responsible for it.
https://youtu.be/t1XFcONNcng?si=E3o8O3uD9CiSAN2oThat was powerful explosion. Lesson to Russian generals - don't get close to electroc scooters.