The body of the 90-year-old man, who was buried alive allegedly by his relatives in Meghalaya's West Khasi Hills district over the suspicion that he practised witchcraft, was exhumed and sent for post-mortem, police said on Tuesday. The body with hands and legs tied and face covered was exhumed on Monday from a 5-feet-deep pit in the Mawliehbah Mawnar village, …