New Delhi, March 11 -- Eleven years after allegedly stabbing his 21-year-old wife to death in the back room of a Maryland donut shop and vanishing into the night, Bhadreshkumar Chetanbhai Patel remains at large - and the FBI has now raised the reward for information leading to his arrest to $1 million.

Bhadreshkumar Patel, a Gujarati national, is wanted for the murder of his wife Palak Patel at a donut shop at 7567 Arundel Mills Boulevard in Hanover, Maryland, where the couple worked the night shift together. Investigators believe he stabbed Palak multiple times in a back room just before midnight on 12 April 2015, when she was 21 years old.

A customer grew suspicious after no one responded to his order and alerted police upon discoveri...