Authorities were called to the scene Nov. 26 for a robbery in progress. Police found Kevin Cullen on the ground unconscious with his pockets empty.
One resident who lives nearby previously said she heard a group of teens laughing as they ran away from Cullen.
The man was transported to a nearby hospital, and he died from his injuries the next day.
Cullen's brother, Tom Cullen, said Wednesday that he was well-known in the city's Mayfair neighborhood. Tom Cullen says his brother was "loved deeply."
Police have not filed charges against the three juveniles in custody.
Copyright 2017 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.