Dr. David N. Hornick walks into City Police Court, with family, for sentencing on Wednesday afternoon.The Schenectady doctor who was known for making house callswas originally arrested for operating what authorities labeled a mobile pharmacy, taking prescription medications from his patients and allegedly selling them on the black market, pocketing over $10,000 according to authorities in 2006. Hornick, 65, who worked out of his home at 16 Crimson Oak Court in Schenectady, had been charged with three felony counts of possession of controlled narcotics and a misdemeanor count of possession of stolen property. Police said Hornick was skimming pills from current patients as well as patients who had died. He was arrested in the parking lot of the Eastern Avenue CVS. Police said that they found nearly 2,000 pills in the trunk of his car.