Revati Singh (75), was murdered at her residence and Rs. 78 lakh in cash and ornaments were looted from their house on July 30, 2010.
Police had later arrested seven persons, including the domestic help Shankar, and recovered a cash amount of 52.80 lakh looted by them.
Last year, the six accused were awarded life imprisonment and imposed a fine of Rs. 5,000 each while the seventh accused Lallan was acquitted by the court due to lack of evidence.