The two accused involved in the serial killings of children in Noida's Nithari village were taken to the Directorate of Forensic Sciences (DFS) for tests for the second day on Saturday.
Moninder Singh Pandher and his servant Surendra, arrested for killing several children, would undergo narco-analysis, brain fingerprinting and polygraph tests in a phased manner on Saturday as well, DSF sources added.
The suspected Noida serial killers had on Friday revealed vital information during their pscyhological profiling and tests, sources said.
The duo had informed the officials that high profile persons, including a senior politician of Uttar Pradesh and a doctor frequented the house of the prime accused Moninder, a businessman.
During the psychological profiling and the preliminary tests, the two were made to lie down with sensors attached to their bodies and were asked a series of questions on Friday — mostly pertaining to their habits and daily routines.
Certain questions about their family background, sources of income, drinking habits, whether they frequently met women, were also asked.
Director of the DSF JM Vyas said it might take three to four days to conduct the tests on them.