Try talking to him thru the door and ask if ur speaking to the girl who was murdered? Tap the door twice for yes once for no if he can't speak..? Work out a communication code from there.. I'm assuming ur boss murdered the missing girl not knowing she (or her family) were into magick and the soul was passed on thru what I'm assuming was part of her remains.. If u can help her she may give ur good boy back. Fingers crossed. I'd definitely try talking to him thru a door tho incase he's not being occupied by a human spirit (they r more likely to want help/peace). In saying that tho, if the thing occupying Rufus isn't human, a door won't keep him out, he probably wouldn't have listened to u telling him to leave u alone to go take a depression nap either tho, haha. I'd bet the missing girl is in Rufus and she wants help..

Long pig is a thing, but, certain cuts of human meat r quite dark and can look like a lean cut of beef, will NOT smell like beef tho, especially once cooking. Humans r actually engineered to avoid, even be repulsed by, the smell of burning (or cooking) human flesh as a warning sign of possible danger. Most even find the smell of burning hair offensive.