Patna , India ( CNN ) -- A week after an Indian school served toxic food to students , leaving 23 dead , its headmistress remains missing along with her husband , police said Tuesday . Five - member team of officers managed to take down the school principal . Police intensify presence near her village in Bihar state . Authorities took statements from 40 witnesses , including the survivors of the July 16 food poisoning .
Five - member team of officers managed to take down the school principal . Police intensify presence near her village in Bihar state . Authorities took statements from 40 witnesses , including the survivors of the July 16 food poisoning .