The shooting is believed to be random, according to Rockford police.
At the evening vigil, music filled the air and people lit candles in remembrance of those who lost their lives.
"I want you to know that none of the victims that we lost are forgotten, because they live on everyday in each and everyone of our hearts and our thoughts," said Jamie Funk, a manager at the bowling alley.
Jerome Woodfork, who died in the Dec. 26 shooting, was remembered as a fierce competitor and a nice person.
"My heart really goes out to the group, because they were all friends," said Toscha Flowers, Woodfork's girlfriend. "It wasn't just him I lost. I lost other friends, too."