Luke: Ben...I need your guidance. The bounty hunter Boba Fett has taken Han Solo.
Force Ghost Ben: Ah, I seem to remember meeting a Boba Fett when I was a Jedi Knight. His "father", who Boba is actually genetically identical to, was hired to kill your mother, but rather than doing it himself, he employed another bounty hunter to do the killing, who in turn decided to use these poisonous slugs to do it. Boba's father Jango Fett was used as the template for all clones during the clone wars. If memory serves me right, Jango met his demise when his jetpack malfunctioned. As Boba seems identical to Jango in seemingly every way, perhaps he shares his father's weakness.