My Neighbor Is A Killer

A boy moves in next door and there's something off about him maria see's something special about him that no one else can see she would hear screaming next door in the basement one night she goes sees what it is and see's the boy is eating and drinking people later that month he makes a love potion for her she falls in love with him and then disappears.
A couple years later there was 2 couples hiking in the woods and found the remains of her and the cops need to find her killer but during the mission a lot of detectives go missing thereselves & there's only 1 suspect (HIM) they find the killer and send him too jail.