A manhunt was underway in St. Peter on Tuesday after a patient at the Regional Treatment Center walked away from the campus. 25-year-old William Daniel Pfeffer Jr is described as a white male around 5-foot-6-inches tall and 240 pounds. He has a black beard and a shaved head and was last seen wearing black pants, a navy blue T-shirt, black shoes, and a white skull cap. Pfeffer was a patient in the lower security portion of the facility for people considered mentally ill and dangerous. He was reportedly nearing the end of his treatment and had more freedom to move around the facility. Authorities searched for him by ground and by air on Tuesday, with the search expected to continue today (WED).