Surah Al Maida Ayat 31
Brother I think the verse makes it clear- Qabil was so ashamed of murder- then the crow was sent and he was even more ashamed of how he just left his brother’s body therr- he didn’t even bury it either honor. I think the murder wouldn’t have been known- it’s not like Qabil would’ve said that Habil just ran away- I think people would’ve known he murdered his brother