Sources said the SHO has been found prima facie guilty of dereliction of duty.
The report has been submitted to Commissioner Neeraj Kumar. The family had alleged that police did not pursue the complaint vigorously after the girl's missing was reported.
Sources said the inquiry has established whereall the policemen have committed acts of omission and commission.
A departmental inquiry has been initiated against SHO Dharampal Singh who was suspended along with investigating officer sub-inspector Mahavir Singh.
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Two persons have been arrested for brutally raping the five-year-old girl on April 15 in a building in east Delhi's Gandhinagar locality where the victim and the accused lived.
The girl was rescued 40 hours later on April 17 and is now recuperating at the AIIMS.
Manoj Sah had told his interrogators that on April 15, his friend Pradeep had come to his house and they had consumed alcohol. Manoj claimed that Pradeep insisted on bringing a girl to the house and he went out and lured the girl with a chocolate.
The girl's family had alleged that the cops had offered them Rs 2,000 to hush up the case and made insensitive remarks when they reported the matter.