A three-member CBI team on Wednesday questioned Koli's mother Kunti Devi, wife Shanti Devi and brother Anand Prakash in Mangrukhal village, nearly 160 km from the district headquarters, they said, adding the team stayed in the village for nearly four hours.
Meanwhile, parents of some children who went missing during the past one year in Dehra Dun have pleaded with the Uttarakhand police to find out their wards.
"We have received complaints from several parents regarding their missing children and will send a police team to Nithari in this regard," Senior Superintendent of Police Sanjay Gunjyal said.
8 to 10 children below the age of 12 have been reported missing in Dehra Dun, police reports said. This has raised concern among the parents especially after the Nithari serial killings.