    Sentence 2: Mcanwiile., law enforcement officials in  Palm Beach Courity , Fla ., where Limbaugh owns aS.  24 million. mansion ‘said; his, drug, use-is, under  investigation’:    ‘Sentence 2: A law enforcement source in, Palmi Beach  ‘County., where Limbaugh owns. a: § 24-million  ‘oceanfront mansion ;,said Jast week that Limbaugh  !s drug use is still under investigation.         