A probe has been ordered into police lapses responsible for the gangrape of a 23-year-old medical student in Delhi on December 16. A probe has also been ordered into the Sub Divisional Magistrate's complaint of police interference while recording the rape survivor's statement, following Chief Minister Sheila Dikshit's complaint to Home Minister Sushil Kumar Shinde.Justice Usha Mehra, a former Delhi High Court judge, will probe police the lapses in the case.