Retired - Loss of jewellery

My sister, Geetha Gopal and Brother-in-Law, K.N. Gopal, were travelling to Chennai from Mumbai by Chennai Mail on 23.9.11. While on their way, they had ordered for tea around 3.30 am on 25th morning between Renigunta and Chennai. They were given tea mixed with drug. After having tea they became unconscious and did not get up even after reaching Chennai Central. During this period, all Jewelleries they were wearing were robbed. Already complaint with the Railway Police has been lodged. Wud be grateful, if you could expedite and ensure that the culprit is caught without loss of time.