New Delhi, Oct 01 (ANI): After Congress MP Rasheed Masood convicted in the MBBS recruitment scam, was sentenced to four years of imprisonment by a Delhi court on Tuesday, Congress leader Rashid Alvi said that the case proves that CBI works independently, unlike BJP's allegation on CBI being a 'caged parrot' and also said that this is unfortunate for the party and that Masood will definitely move higher court for leniency.