I'm looking for a horror film made presumably in the 90's when I was growing up. I can't remember much, so it's hard to look for.. Anyway, what I remember most is the female lead finding her friend's head in her fridge/freezer. I think a few of her friends got murdered by some creepy guy who lives in a lair of sorts and wanted to kill her too, I guess.. I remember being afraid of toilets and sewers for a while, he either lived there or was washed out there in the end. He had a switchblade-sorta knife. It would go in and out quickly and was scary as shit. There was some scene with the killer and lead in his bed, where the knife was shown. I don't remember any other "specific" details.
I need to find this and don't know how to look. Help.