The 64-year-old died during a late shift on Friday April 27 and police initially believed he had suffered head injures as a result of being attacked.
He was found lying near his bus at the Waterloo bus interchange. His cash box was missing.
It was later determined that he had died from a medical condition. It was believed he had a heart attack.
A group of youths handed themselves in to police on the following Sunday and two of them were charged with theft. Another two were dealt with by Youth Aid.