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A West Valley woman answered her front door Monday night expecting to find trick-or-treaters, but instead was confronted by a knife-wielding person wearing a "Scream" mask.

The 19-year-old woman opened the front door of her home about 10 p.m. near 4600 West 3100 South and got an unpleasant trick from a person definitely not looking for a candy treat.

Police Sgt. Mike Powell said the suspect, dressed in black with the trademark white mask, reached out and slashed the woman across the face with a knife and then fled.

The woman was transported to the hospital where she received a "fair number" of stitches. She was expected to recover and was doing better, Powell said Tuesday.

"She's very scared," Powell said. "Understandably so. We are concerned about the situation and the circumstances itself. It's a very egregious action and very violent."

He said police don't have any suspects and said officers are interviewing neighbors in hopes that they might have seen something. Powell said the woman reportedly wasn't having problems with anyone.

He said officers want to get the perpetrator off the street so no one else is injured.