In a grisly online plot, a New York police officer planned to torture and roast alive his fiancee with a butcher in India with whom he chatted on the internet, an Federal Bureau of Investigation agent has testified in court.

Gilberto Valle, 28, told Aly Khan, that he "longed to butcher and cook female meat" during an online chat last year. Khan offered to provide a place in Pakistan to kill the woman once she was brought to India, FBI agent Corey Walsh testified on Wednesday. Valle, dubbed the 'cannibal cop', is charged with conspiring to kidnap, rape, kill and eat women.

He is also charged with illegally accessing a government database to research potential victims, media reports said.