Busy piecing together evidence in the Nithari serial killings, the CBI on Friday took main accused Surendra Koli to the D-5 house of co-accused Moninder Singh Pandher, where he handed over to sleuths an axe he allegedly used to chop up children and women after strangling them.
Koli handed over the axe, concealed in bushes outside the house, to a team led by CBI Joint Director Arun Kumar, official sources said.
The axe, according to the sources, had dried bloodstains on it and was sent for a forensic examination.
Koli had informed CBI officials about the axe during his questioning on Thursday night. He allegedly said he chopped up the children and women with it after strangulating them, the sources said.
He also indulged in necrophilia, allegedly abusing the victims sexually after killing them, they said.
With greater stress being laid on the identification of people whose skeletal remains and viscera were found by the CBI and Uttar Pradesh Police, the agency has roped in noted DNA expert Lalji Singh as a consultant for its probe.
Singh is the expert whose opinion in the Priyadarshani Mattoo case was rejectd by Additional Sessions Judge GP Thareja but upheld by a division bench of Delhi High Court.
CBI officials said the country was facing an acute shortage of DNA experts and Singh's appointment as a consultant would expedite its probe.