In Delhi's Vivek Vihar, a 40-year-old woman, Mahender Kaur, was found dead with strangulation marks. Her husband, Kulwant Singh, subsequently died after jumping in front of a train. While the son initially suggested suicide, post-mortem confirmed strangulation. Police suspect the husband strangled his wife after a quarrel and then committed suicide. The investigation was complicated by neighbors moving the body before police arrival.