Tukaram Omble was killed while trying to capture Kasab on the dreaded night of November 26, 2008.
"I am proud and very happy that my brother's efforts have paid off," a visibly jubilant Eknath said.
"We are very happy and satisfied. Ajmal Kasab should have been hanged in public, but I know our law does not permit this," he said.
"Home Minister Sushil Kumar Shinde has stood by his promise that he would take decisions that would satisfy Indians," Eknath said, adding that he would like to thank President Pranab Mukherjee as well.
An unarmed Tukaram Omble was shot dead by an AK-47-wielding Kasab at Girgaum Chowpatty in south Mumbai, but not before he ensured that the terrorist was caught alive.