Officers released a sketch of the suspect who they say went up to a man in a wheelchair while he was sitting in his driveway in November and pulled out a gun.
The man had just filled his prescriptions at a pharmacy. Police say the pills are what the gunman wanted.
He allegedly demanded the pills and then pointed the gun at the man's daughter.
Anyone with information is asked to call 9-1-1 or Silent Witness at 480-WITNESS.