towards the teachers quarters cctv footage confirms the movement he directly went to nazias room and sat on the dining table over dinner sharif urged him to break all relations with his sister which vinay refused an argument ensued and suddenly sharif covered vinays s mouth with one hand and punched him several times on his abdomen he pushed him to the wall and banged his head on the wall postmortem report confirms injury in the back of the head and a punctured liver following which vinay collapsed dwivedi said the scuffle woke nazia and her daughter who were sleeping in one of the bedrooms of the flat nazia rushed to the dining room and saw the unconscious boy on the floor bleeding profusely she thought by that time the boy was already dead in panic they dragged the boy to the corridor and threw him on the ground from the first floor balcony dwivedi said an android camera has captured the audio of footsteps when vinay was being dragged out of the room by teacher and her son at around 120am in the first floor corridor the audio clip has the sound of door being opened followed by footsteps and then a big thud the falling of the boy on the ground then the teacher and her daughter used a wiper to clean possible bloodstains in the corridor and then closed the door the sound of the wiper had also been recorded in the camera the camera could not capture image because it was dark asp hatia prashant anand who monitored the probe at the site said the audio clip established the sequence of the crime the husband was away from the crime scene but he was arrested because he guided them on the phone to destroy evidence the police said the police spoke to the girl who admitted that she used to meet vinay and talk to him i liked to talk to him the police said quoting the girl who is shocked and shattered by the incident bloodstains were found on the curtains the floor and the wall of nazias room blood samples collected from their room were sent for forensic tests the tests confirmed it was vinays blood said a police officer the mother and son were booked under section 302 of the ipc for murder while the daughter and her father were booked under section ipc 201202 all the four have also been booked under section 34 of the ipc for abetment to the crime the couple hails from rewa in madhya pradesh