On the back of the DVD
The last bit of the description on my DVD case says "An ex-cop is trying to find out who the killer is and what possessed him to start the bloody rampage. But is it the ex-boyfriend or is it someone else?" WTF?
Also falsely credits the Linda character with having the deranged ex-boyfriend.
And, of course, has a screen shot giving away the killer, as do most of the copies of this movie.
https://imgur.com/a/JmWG7ee