Carlos Hernandez, a 44-year-old painter, was killed in the carjacking, which took place shortly before 6 a.m. in Waukegan.
Police have three people in custody in connection with the deadly carjacking. They have not released any information about the suspects.
The manhunt began after the early morning attack when both relatives and neighbors say Hernandez was approached by three men as he waited in his nephew's car.
"I just hear him step outside. Next thing I just hear from my aunt saying, Juan Carlos, Juan Carlos, they're taking your uncle, they took the car. I immediately run outside, but the car was no longer here," said Juan Uriostegui, Hernandez' nephew.
The attackers then allegedly pushed the husband and father out of the car after shooting him near the intersection of Julian Street and North Avenue. The 2003 Cadillac STS was abandoned about a block away, near the corner of Julian and County Road.
"An officer came, he knocked on the door and asked us if we seen anyone that got out of the Cadillac. So I told him, no, I ain't seen anybody, but I heard somebody out here making a lot of noise," said Larry Jones, neighbor.
Authorities said there were at least two crime scenes related to the case. Police dogs brought to the last crime scene eventually led authorities to the Lakeside Tower complex. The last suspect was wheeled out Thursday afternoon by paramedics after being freed by police from an air duct where he was hiding between floors.
Police said two of the suspects live in the complex.
The 14-story apartment building was locked down for much of the day as police searched for the suspects responsible for the carjacking. Dozens of residents were not allowed to exit or enter the building.
"I just noticed when I was walking back from the store that they said they wouldn't let anybody back in," said Kristen Pate, a displaced resident. "They just said it was a shooting."
Police say they have not yet found the gun used to kill Hernandez, but they did recover a BB gun, though it is unclear how that weapon may have been used in the crime.