She alleged that Krishna had influenced the director of the state forensic laboratory as he had refused to conduct the polygraph test on the accused on medical grounds.

Satyendra Singh's decomposed body was found floating in the Ganga in June.

Earlier, Laxmi Singh had demanded death penalty for Krishna and his son Chanakya. 'They should be hanged. They murdered my husband and made me a widow. They should not be given anything less than death,' she said.

Krishna was sent to 14 days' judicial custody Saturday.