A first information report was registered against her on charges of murder and criminal conspiracy, police said.
Her husband Rai, accused of buying the pesticide that got mixed with the food, was on the run after the mid day meal tragedy and surrendered in court two months ago.
A forensic lab report confirmed traces of toxic insecticide were found in the cooking oil used for making food at the school, police said.
Updated on: October 21, 2013 11:43 IST
