BRUNSWICK, Ga. -

Police in Georgia continue to look for leads after a Jacksonville business executive man was shot to death on the side of Interstate 95 while fixing a flat tire.

Richard Hollis, 49, was found leaning on his car near Exit 42 in Glynn County on Monday morning. His family says he was shot in an apparent robbery.

As the family began making funeral arrangements Tuesday, they're hoping police are able to find some clues near Hollis' car and find out who killed their loved one.

"It makes it harder to believe in a better world that we're living in when things like this happen," family friend Blake Dunbar said.

Dunbar is the same age as Hollis' 23-year-old son, Jordan. The two have been friends for years, and Hollis coached them in baseball. They are all still trying to figure out why this happened.

"I think it's still not hitting as much as it's going to when the ceremony and funeral come up," Dunbar said. "We've tried to keep the house busy and the mood kind of light."

Investigators said it was clear Hollis had stopped Monday to fix a flat tire. Glynn County police believe he was killed sometime between 5:30 and 7 a.m.

Rhonda Hollis said her husband was found face down in the trunk of his car, leading police to believe he may have been approached from the back and caught by surprise.

Police Chief Matt Doering said Monday a maroon car was spotted leaving the scene.

The family is just hoping an arrest is made soon.

"Obviously some closure would be nice," Dunbar said. "I think the detective and the people on the case have been pretty generous and awesome dealing with that and communicating with the family and stuff."

The Hollis family said Hollis' wallet was missing, along with other items in his car. They're hoping clues will be found inside of the car that will lead to the killer.

Anyone with any information about the killing is asked to call the Glynn County Police Department at 912-554-7802 or Silent Witness at 912-264-1333.