But the sheriff says Glover should never have been released because he was also charged with murder in a fatal shooting along Interstate 94 in 2012. Those charges were filed in 2015.
Prosecutors say that Glover opened fire on a Jeep in September, 2012, killing the 25-year-old driver, Larry Porter.
In a statement, the Illinois Department of Corrections said it "did not receive any additional documentation or information indicating he should be held beyond his February 24th, 2017 release date."
The Cook County Sheriff's Office is currently searching for Glover in order to return him to custody.
Anyone with information about his whereabouts is asked to contact police at 773-674-0169.