Tom McLoughlin, director of Friday the 13th Part VI: Jason Lives, takes on the true crime case of Laurie Dann, whose name was changed in Murder of Innocence to Laurie Wade (played obsessively by Valerie Bertinelli).
In the first half of the movie, they're establishing just how unstable Laurie was, really sensationalizing her illness by depicting her doing everything from removing all the food from her refrigerator & replacing it with teddy bears & nail polish, rubbing raw meat all over herself, drawing stick figures in lipstick on mirrors/walls, to placing furniture all over the place--neatly stacked--like she's the angry, misplaced ghosts in Poltergeist.
The final part reins in the outlandishness a bit to make room for her real life unhinged rampage (liberties taken, it actually plays up the shooting part and downplays other things, America...).