The young couple was unable to pay their rent on time and was hence subjected to regular verbal abuse by their landlady. But when the old lady started swearing against their newborn, the couple decided that enough was enough.
They then hatched a plot to eliminate the 60-year-old landlady Bishno Devi.
As per plan they strangled the old lady at her northwest Delhi's Bhalswa Dairy residence. The man, Sachin, 22, also chopped off her head and arms which the couple later tried to burn, police said.
They then stuffed the headless, armless corpse in a gunny bag and dumped it near her home. Other parts of her body were dumped at several isolated places, said the police.
Police arrested the couple twenty-eight days after they murdered the landlady.
Sachin, who works as a security guard, and his wife, whose name was not disclosed by the police, lived in a room at the victim's house on rent.
According to a senior police officer, Sachin, in an inebriated condition, strangled Devi to death on February 1, before fleeing with his wife and baby.
"Eight days later, the couple returned to the victim's house to check whether local residents had found out about her murder or not. They were surprised to find the body still lying inside the house," said the senior officer.
"Initially, they tried to set her body on fire, but when they failed, Sachin chopped her body parts and dumped them at deserted places," he added.
Romil Baaniya, additional DCP (northwest) said the murder came to light on February 11, when somebody spotted the body.