Of the 190 witnesses questioned in the Dr Payal Tadvi suicide case at Nair hospital two months ago, four prime witness have confirmed the caste-based harassment by the three accused doctors — Hema Ahuja, Bhakti Mehare and Ankita Khandelwal. This is part of the 1,800-page charge sheet filed by the Crime Branch in the case on Tuesday.

The cops have videographed the statements of the witnesses to prevent them from turning hostile. The charge sheet also records the revelation that Dr Payal and another doctor were harassed by the accused to such an extent that they were unable to complete the mandatory post-exposure prophylaxis course after attending to an HIV + patient.