"There are times I can't sleep just thinking about it, said Aguilar's mother Elvira. "I still have to get up and go to work."
RELATED: Family demands justice for nurse killed in Little Village drive-by after suspect acquitted of previous weapons charge
The gathering called to bring attention to a case which, in some respects, has gone cold. While a 19-year-old remains in jail charged in connection with his murder, Armando Lopez is believed to have been the driver, not the shooter.
Investigators at one point thought to have identified a minor as the gunman, but charges against him have not been filed.
RELATED: Man, 19, charged with murder after nurse fatally shot in Little Village drive-by
"They're not taking action," said Aguilar's uncle Joshua Alcazar. "They're not taking the proper course to keep these criminals off the streets."
"It doesn't feel like it's been a year," said Aguilar's girlfriend Lindsey Owens. "It just feels like last week I was with him and he was buying his new blue scrubs. The ones he was killed in."
RELATED: Father of Little Village nurse killed in drive-by shooting speaks
Another family fighting for justice is the loved ones of Michael Colon who was shot and killed last month. His family says the 16-year-old was walking his dog in Brighton Park when a still unidentified gunman opened fire on him
"We can't sleep, and we know the family of Frank can't sleep knowing that the people who murdered them still drive around freely," said Anthony Colon, Michael's brother.
The court case against Armando Lopez continues, with a hearing scheduled for Monday. Police also said they search for the gunman continues.