Filmed at some of the actual locations.
Producers assured the neighbors (close friends of Nicole) that the film was not connected to the murders, but later filmed a speculative, scream-filled version of the gruesome murder directly beneath the window of a bedroom occupied by a child living next door.
The film was originally intended to be a horror movie, focusing on the true connection between OJ Simpson and a serial killer Glen Rogers aka "The Casanova Killer." In the original version, the demon possessing Rogers jumps into Simpson during their chance meeting (an event which did actually happen). Due to legal threats from the Goldman and Brown families, the film was re-edited into it's current form.
The primary filming location was Nicole Brown's former townhouse near Westwood Village, where she lived immediately before moving to the location of the actual murder.
Producers assured the neighbors (close friends of Nicole) that the film was not connected to the murders, but then left a white Bronco picture car parked in front of the house during a week-long hiatus.