James Holmes -- The Bizarre Mug Shot

Officials in Colorado have just released James Holmes' mug shot -- showing the "Dark Knight Rises" shooter in an orange jumpsuit ... with a crazed look in his eyes.

The photo was taken Friday afternoon ... just hours after the 24-year-old opened fire in a movie theater ... killing 12 people and injuring 58 more.

Holmes appeared in court Monday morning ... with the same odd look on his face.