Complex sentence: Sean asks Jimmy if he has seen Dave, because he is wanted for questioning in another case, the murder of a known child molester whose body has been recovered, serving to confirm Dave's allegation of having murdered a pedophile and hiding the body thereafter.
Split into simpler sentences: Sean asks Jimmy if he has seen Dave, because he is wanted for in another case, the murder of a known child molester. During this conversation, Sean tells Jimmy the body of a dead pedophile has been recovered, serving to confirm Dave's allegation of having murdered a pedophile and hiding the body thereafter.