Recovery of severed head of a baby in Uppal area here on February 1 was a case of human sacrifice, Rachakonda police said today, after arresting a 40-year-old cab driver and his wife for the crime. K Rajashekar, the accused, had been advised by somebody to commit a human sacrifice for curing his wife's chronic illness, police said. He abducted an abandoned baby girl, around three months old, from the roadside in Boyaguda area on January 31, said Rachakonda police commissioner Mahesh M Bhagwat.