Fakhoury's family and local law enforcement are urging the public to come forward with information in the case.
"I know it won't bring my brother-in-law back but maybe it would save another person's life... they were cold blooded murders… to shoot someone in the back of the head, those are cold blooded murders," said Fakhoury's brother-in-law, who did not want to be named.
"Somebody out there has information on this crime. They know who did this and we're appealing to them to them to please contact us," said Chief Steven Stelter, Brookfield Police Department.
On Tuesday, a reward for information leading to an arrest was announced. Some of the money comes from a fundraiser at Ryan's Public House.
"Everybody had lovely stories of him and they just wanted to show the family support that we're all behind them... This was our community as well," said Bernadette Ryan, Ryan's Public House.
"This place was very packed and ... maybe a lot of people who probably had never been in there, and, again, like me, who didn't know him wanted to say we're here for you and hopefully we will apprehend these people," said Nancy Sudeikis.
"Send a message this can't happen in this community that the community is not going to stand for it," said Bill Frampton.
Fakhoury's family is grateful for the outpouring of support from the community.
"The people of Brookfield and the businesses in Brookfield, the charity work to raise the money. They did raise 80% of this money. Those are the people I want to thank," said Fakhoury's brother-in-law.
"This happened in our own backyard. They were truly distraught and over this. The owners here, business owners have come together and they raised a large amount of money for the family. That's very indicative of this community. They come together when these things happen," said Chief Steven Stelter, Brookfield Police
Anyone with information should call Brookfield police, who said tipsters can remain anonymous.
Fakhoury, who lived in Alsip, is survived by his wife and two young children.