Kolkata Rape-Murder: Fresh Door Lock Mystery; CBI Probes Twist; Accused 'Harmless', Says Mother

Fresh details emerge in Kolkata rape and murder case as CBI intensifies probe. The probe agency is reportedly scrutinising a "broken bolt" on seminar hall's door where the crime occurred. CBI is trying to understand how the incident happened 'without any interruption' and ascertain whether 'anyone was guarding the culprits'. Watch for more.