Mohali, Dec. 15 -- Police have booked a Nayagaon resident for allegedly murdering his 60-year-old NRI mother while she was visiting him from Australia in July.

The accused has been identified as Nitin Sarna, a resident of Vikas Nagar, Nayagaon. Working at a private university, he is the elder son of the victim, Shakuntla Devi.

According to police, Devi, who retired from Punjab government as a treasury office employee, had been living in Australia with her younger son, Naman Sarna.

She had arrived in India on July 19 to visit Nitin at his residence.

In his complaint, Naman told police that two days later, he received a phone call from Nitin, informing him of their mother's sudden death.

Suspicious of the circumstances, Naman requested...