Gov Karnstein wrote:
Eddie was aware of things but most of his time was as a valet, rather than an active participant so far as we know anyway. His jumping, whether he dies from the fall or not, is an act of someone not up to handling even the small time criminal life of a bag man.
Eddie jumped because he was between a rock and a hard place. His loyalty to Nucky was such that he couldn't take his failure in being captured and giving up info, and the stuff about his family in Germany confirmed to him that he had failed there, too. There was nowhere to go. He'd rather die than be an informant or be deported. He could handle being a bag man. He couldn't handle being a snitch and a disowned father at the same time.