In a dramatic turn in the death of 2.5-year-old Devendu, Kerala police have moved court seeking permission to conduct polygraph tests on the child’s mother Sreethu and her brother Harikumar, following Harikumar’s latest confession that Sreethu killed the child. Harikumar, who is currently in judicial custody, reportedly told Rural SP KS Sudarsan that Sreethu was responsible for Devendu’s death .