Krishna, the compounder of Noida dentist Rajesh Talwar, who is accused of killing his daughter Aarushi, could be subjected to another test by CBI at a laboratory in Bangalore for eliciting more information, police said.
The CBI wants Krishna, who underwent a narco analyis test on Thursday in connection with the double murder case, to recoup, the sources said but declined to indicate the probable date on which the fresh test would be carried out.
The investigating agency also declined to specify the nature of the tests proposed.
Krishna, who is in CBI custody, was questioned in connection with 14-year-old Aarushi's murder.
Sources in state-run Bowring Hospital denied Forensic Laboratory experts performed another narco test on Krishna.
According to a doctor, such test cannot be repeated on a person less than 36-hours after being held the first time.
Forensic Science Laboratory, Assistant Director Malini said on Thursday said that the polygraph test had been conducted on Wednesday and a narco analysis on Thursday and a brain mapping is slated for today.
The assistant director, however, was not present in the city on Friday.
Krishna was brought here on Wednesday to subject him to polygraph and narco tests.