In the Book of Genesis, Abel himself did not commit any crime. Instead, the story focuses on Abel’s brother, Cain. Cain, in a fit of jealousy and anger, kills Abel. The crime committed was murder. Cain’s crime was driven by his jealousy because God favored Abel’s offering over his. Abel had offered a lamb from his flock, while Cain had offered fruits from his crops. God accepted Abel’s offering but rejected Cain’s, which led to Cain becoming angry and ultimately murdering his brother Abel in the field. This act is one of the earliest and most tragic in the Bible.