By Henry Moore The mum of kidnapped baby Halo Branton shared a series of chilling Facebook posts hours before her arrest for the death of the child. Persia Nelson, 24, has been accused of one count of second-degree manslaughter after she allegedly “dropped her child down an approximate ten-foot deep pipe access area.” Police launched a massive search for Halo after authorities were told she had been kidnapped, they later called off their hunt reporting the baby had been found and rushed to hospital. Lieutenant Ryan Macherone of The Schenectady Police Department later confirmed the poor infant …