system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] Why did none of the clones notice General Grievous's fighter leaving Utapau?

Since there were also no clones patrolling near his body, its possible the only confirmation of Grievous's death came from Kenobi, who is now a traitor according to the clones. 

Even after Order 66, stopping the CIS is still a big deal and spotting Grievous's fighter leaving after his apparent death is probably something you should tell Cody about.
gpt
Well, Greivous's corpse was still on the landing pad so a cursory investigation would verify that he was dead. They might have surmised that Kenobi survived and used it to escape but not much they could do about it after the fact.