Son pulls knife on mom after Justin Bieber costume ban

Surprise police said a boy pulled a knife on his mother who refused to let him go trick-or-treating as a "gay Justin Bieber," the singer and teen idol.

The 12-year-old boy had been grounded Halloween night after an argument with his mother, who said his costume idea was disrespectful, police spokesman Sgt. Mark Ortega said.

After throwing a tantrum and getting grounded from trick-or-treating,