Two weeks before he allegedly killed a man who was out walking his dog in Brewerytown, a suspect in the slaying — who had two previous robbery convictions — was released on dramatically lowered bail in an armed kidnapping and an assault case, court records show. Police said Sunday that they had arrested Davis L. Josephus, 20, in the slaying of 25-year-old Milan Loncar, who was shot Wednesday night while walking his dog about a block from his home.