"Kolkata doctor raped and murdered: Mamata gives police 7 days to crack the case."

The 31-year-old post-graduate trainee was raped and murdered in a seminar hall of RG Kar Medical College and Hospital. Her semi-nude body was discovered on August 9.

"Kolkata doctor raped and murdered: Mamata gives police 7 days to crack the case."

The protest by the medical fraternity over the rape and murder of a junior doctor at a government-run hospital in Kolkata has led to the disruption of hospital services across West Bengal. The protests, now in their fourth day, involve interns and postgraduate trainees at state-run medical establishments supporting the junior doctors' strike at the hospital. The protesters demand justice for the 31-year-old woman post-graduate trainee doctor who was raped and murdered at RG Kar Medical College and Hospital in Kolkata on August 9. 

The police have arrested a civic volunteer, Sanjay Roy, who admitted to the crime. He has been placed in police custody until August 23. In addition, several high-ranking officials of the RG Kar Medical College and Hospital have been suspended due to negligence in the matter.

Here's a timeline of the events:
- August 5-8: Sanjay Roy claimed to be on duty at a Police's Welfare Society meeting in Kharagpur. 
- August 8, morning: He visited RG Kar Hospital to help admit a patient and later returned at night to assist with an X-ray.
- August 9, early hours: Sanjay returned to help another patient with surgery. After that, he allegedly raped and murdered the junior doctor in a seminar hall. He was captured leaving the hospital premises on CCTV at 4:37 am.
- Later that morning: Sanjay was detained by the police and, after interrogation, was arrested and charged with rape and murder.