Hommerson was found guilty in January in the murders of Marvin and Kay Lichtman in 1996. He fatally shot the couple and then set their house on fire. Their bodies were found in their burned out home.
Hommerson was arrested in Mexico.
Relatives left the Waukegan Court Friday carrying a photo of the Lichtmans.
"We believe that justice has been served in this case. We've waited a very long time for this day. It's a relief for all of us, although it's not bringing back Uncle Marv and Aunt Kay. But they're in our hearts, and they're here, looking down very, very happy with the results," said Sheri Pyle, the couple's niece.
Pyle also said Lake County prosecutors did a wonderful job of proving Hommerson is guilty.