The suspect's father and sisters tried to intervene, but sustained injuries in the process.
The nephew allegedly took explicit pictures of the girl as she was bathing.
One of the officers allegedly said she could either pay him RM10,000 (S$3,000) or sleep with him.
The woman suffered lacerations on her head and left hand, and was sent to the hospital.
The father was overpowered by the reptile and could only watch as his son was dragged into the river.
Images showed the white-haired lady lying in a pool of blood on the road.
She claimed that she concealed the body only out of panic and fear of criticism.
He was due to perform at Suntec Convention & Exhibition Centre on Saturday (20 Sept).
It all started when she knocked on the restroom door to investigate the long queue.
Some have called out the mother for bad parenting, while others show empathy.