Ajmer, May 29 -- A 40-year-old woman, along with her teenage son and daughter, allegedly murdered her husband, his second wife, mother and niece before setting their bodies on fire inside an SUV to make the deaths appear as a road accident in Rajasthan's Ajmer district, police said on Thursday. The incident took place in Shri Rampura village under the Borada police station area in the early hours of Thursday. Police said they received information around 5.30 am that a Scorpio vehicle had caught fire and several people were trapped inside. Three charred bodies were found inside the vehicle, while another woman was discovered in a semi-burnt condition in a nearby field. She later died during treatment. The deceased were identified as former sarpanch Ram Singh Choudhary (45), his mother and former sarpanch Pusi Devi (85), his second wife Surgyan Devi (40), and niece Mahima. Ajmer superintendent of police Harshvardhan Agrawala said, "Ram Singh's first wife, 40-year-old Sunita, has been arrested, while her 16-year-old son and 19-year-old daughter have been taken into custody for their alleged role in the killings," Agrawala said. "Preliminary investigation revealed that Ram Singh allegedly subjected his first wife and children to physical and mental harassment for years. He had assaulted them again on Wednesday night, after which the accused allegedly planned the murders," the SP added. Police said Sunita was allegedly pretending to cry, while her son was seen calmly drinking tea....