ALLENTOWN, Pa. - Activists on Monday pressed their demand for police accountability after video emerged over the weekend of an officer placing his knee on a man’s head and neck area outside an Allentown hospital.Activists said Allentown police appeared to violate their own use-of-force policy against neck restraints when an officer used his knee to bear down on the man’s head.Police launched an internal probe and promised to release additional video of Saturday’s incident.“Pending the outcome of this investigation, if they are not on the right side of justice, then those officers need to be terminated,” said Justan Parker, founder of Black Lives Matter to Lehigh Valley.The videotaped incident occurred nearly seven weeks after the death of.