Generate a more complex version of this sentence In 2009, hiring of two independent organizations reviewed BART's policies and procedures in the process of overseeing the BART Police.
Mesthi wae, versi sing luwih rumit saka ukara kasebut yaiku "Ing taun 2009, nyewa loro organisasi independen mriksa kabijakan lan prosedur BART ing proses ngawasi Polisi BART sing nyelidiki perkara Polisi BART Penembakan Oscar Grant. "