Vivek Saini, an MBA student in Georgia's Lithonia, was a part-time clerk at a convenience store that sheltered Julian Faulkner - a homeless drug-addict.
He had shown kindness to a homeless man. The day he stopped helping him, he killed him brutally.
Mr Saini had helped the man by giving him chips, water and even a jacket for warmth.
On January 16, the 25-year-old refused to give Faulkner free food and the refusal allegedly led to the fatal attack.
He was attacked while he was leaving for home. A chilling CCTV footage of the incident showed the accused repeatedly hitting Mr Saini with a hammer.
The accused was seen mercilessly striking Mr Saini, nearly 50 times, on the head and face with the hammer. He kept hitting his lifeless body on the floor.