The two accused in serial killings of children in Noida's Nithari village were brought to Gandhinagar on Friday by police for extensive forensic tests.
Moninder Singh Pandher and his servant Surendra Kohli were brought early Friday morning to Ahmedabad and were taken to the forensic department at Gandhinagar amid tight security.
They will undergo lie detection test, narco-analysis and brain finger printing at the Directorate of Forensic Sciences, Investigating Officer Dinesh Yadav said.
Director of the DSF J M Vyas told reporters it might take three to four days to conduct the three tests on the two accused. "We will try to do it faster," he added.
Police, who escorted the two alleged serial killers from Noida in Uttar Pradesh, said they will brief the FSL officials regarding the case first.
Noida's District Superintendent of Police Dinesh Yadav said they expect the forensic tests on the two to be conducted on Friday or Saturday by the FSL. He said they had 10 days remand of the accused.
