NEW DELHI: A software engineer along with his wife and son suffocated to death at their home on Wednesday, police said, adding that the room heater was found switched on. Satish Kumar, 35, his wife Shashi, 30, and their five-month-old son Archit were found dead on the bed when the door of their rented home in south Delhi’s Kotla Mubarakpur was broken open. Kumar, who belonged to Bihar, worked as a software engineer in a private company in Gurgaon.