5. In which of the following cases has the Supreme Court, inter alia, requested the Chief Justices of every High Court to register a suo motu public interest petition with a view to identifying the next of kin of the prisoners who have admittedly died unnatural deaths in prisons as revealed by the NCRB during the period between 2012 and 2015 and even thereafter, and award suitable compensation, unless adequate compensation has already been awarded.