‘Cannibal cop’ plotted with goat-slaughtering ‘butcher’ to kill wife: feds

Cannibal cop Gilberto Valle plotted to slaughter his future bride with the help of a depraved Pakistani “butcher” who bragged about his skills — and even sent the officer a video of a goat’s throat being slit, the feds said yesterday. In an online chat with Valle last year, a…