Dr. Drew's Alleged Stalker -- The Mug Shot

Dr. Drew Pinsky's alleged stalker refused to smile for cop cam when the Pasadena Police Department booked him for felony stalking yesterday.

As we previously reported, Charles Pearson was arrested at Pierce College in Woodland Hills yesterday after Dr. Drew's security team discovered that Pearson had posted his location online.

Pearson is still in custody -- his bail has been set at $150,000.