"I will never take up any other investigation if Mohanlalganj crime investigation fails the test of trial," Deputy Inspector General (DIG), Lucknow range, Navneit Sikera said on his Facebook page.
After the arrest of the accused Ram Sewak Yadav, family members of the woman and opposition parties including BJP, Congress and BSP had demanded a CBI probe into the incident.
The 35-year-old widow who was brutally murdered on January 16 night after she resisted an alleged rape bid hailed form Deoria district and her father had reached his native village here with her two children - a daughter and a son.