The throats of all the deceased were slit with a sharp edge weapon while the abdomen of pregnant Tabassum was brutally stabbed.
When TNIE contacted HM Builders, they confirmed the incident but denied any assault had taken place.
The matter dates back to 2011, when G Jamuna of Karaiyanchavadi in Tiruvallur district, purchased two plots through a real estate agent.
A day after a 51-year-old home-alone woman was found dead at K K Nagar, police arrested her husband. Police said he had enacted a drama as if the killing was for gain.