Two of the victims, who were found in the trunk, were identified by the Cook County Medical Examiner's Office as Crawford L. Davis and Tyrece D. Bailey, both 23 and both from the same address in the 1900-block of W. Garfield Blvd. in Chicago. Bailey's brother, Stephen Bailey, who also lived with the other two victims, was found dead in the back seat.
All were pronounced dead just before 2 a.m. Thursday.
The motive was unknown, and no suspect was in custody.
Investigators say the men all had their hands bound with rope and they had apparently been beaten to death.