The accused - Shiv Prakash Paikra (29) surrendered before police after murdering his aunt Manki Bai with a stick on the outskirts of village Sonhat, Korea Superintendent of Police B S Dhruv told PTI.
As per the statement given by the accused, his wife was blessed with a baby on August 17, whose condition was not well since his birth.
"The child was discharged from a hospital in Ambikapur on August 30 after a brief treatment and was brought home. However, the infant's health deteriorated and he died the next day," Dhruv said.
"Ever since the death of his child, the accused was looking for an opportunity to eliminate the woman," Dhruv said.
The accused has been booked under section 302 (murder) of IPC, he said adding that further probe was on.