It has been a month since a 31-year-old doctor was found raped and killed at a seminar hall in Kolkata's RG Kar Medical College and Hospital. The incident has sparked nationwide outrage and every corner of Bengal has witnessed massive rallies demanding justice in the case. The Mamata Banerjee-led government has come under the scanner for its handling of the case and accused of shielding the accused and attempting a cover-up.

Days after the incident, following a petition from the victims' parents, the Calcutta High Court transferred the sensitive case to the Central Bureau of Investigation (CBI). But nearly four weeks after the central agency took over the probe, there have been no more arrests apart from Sanjay Roy, in the rape-murder case. A civic volunteer who frequented the case, Roy was arrested by Kolkata Police a day after the incident and CBI took his custody later.

The CBI has arrested Dr Sandip Ghosh, former principal of the state-run hospital, and three others for alleged financial irregularities at the hospital. A CBI official has told news agency PTI about some of the factors that have proved to be roadblocks as it tries to unravel this heinous case. The Crime Scene The CBI official said they were unable to join several dots due to lack of evidence from the crime scene and this has affected the investigation.

The central agency found that Dr Ghosh ordered the demolition of a restroom and a toilet near the seminar room on August 10, the day after the body was found.