19-year-old Vijay was arrested from Subhash Nagar area where one of the deceased's daughters stays.
The deceased was identified as Somitra Devi. On Sunday around 3:35 PM her elder son Bablu informed the police that his mother's body was found inside the bed box, a senior police officer said, adding that there were strangulation marks on her neck.
Somitra's younger son was found missing since morning following which a manhunt was launched to nab him as under the circumstances, he was the prime suspect. He was finally apprehended from Subhash Nagar within a few hours, police said.
"He then dumped the body in double bed's box and locked the house before fleeing. He threw the bunch of keys in a drain in front of C-Block Gurudwara, near PVR and at his disclosure the bunch of keys has been recovered," said Deputy Commissioner of Police (West) Ranveer Singh.