Police said Kim, a father of two, did not know Winkler and detectives do not believe the two were related in any way.
Longtime family friend Charles Chae, 76, was friends with Kim for more than 30 years. He said Kim was a fun-loving and righteous man who loved to sing and play golf.
Chae said he couldn't believe it when he got the news that Kim was killed while out on his daily walk near his home in Fishers.
"I still couldn't believe a 17-year-old boy, what state of mind, shooting a 73-year-old man three times and cutting the throat, I cannot imagine what kind of a mind -- he was doing such a horrible thing," Chae said.
Chae said Kim came to America from Korea when he was very young. He was a hardworking man, husband, father and grandfather.
Chae said his friend enjoyed karaoke with his friends from church.
"He's good-looking guy and he sings, he loves to sing. So he holds the microphone and karaoke sings really, really well. That's the memory I have," Chae said.
Chae said he is not only praying for his friend's family as they mourn, but also for the family of his friend's accused killer.
"Their son's life is ruined, but also Kim's family's life is ruined," Chae said.
Chae said the visitation and funeral for Kim will be held Thursday night.
Kim and his wife were retired. People in the community may remember him because the couple owned a Baskin-Robbins ice cream store for a few years near 86th Street and Ditch Road.