(AP) — Just days before he left office, former Illinois Governor Bruce Rauner granted posthumous clemency to a man imprisoned for a stabbing that a serial killer later confessed to committing.

The Illinois Innocence Project at the University of Illinois in Springfield said Grover Thompson received the first posthumous exoneration in state history.

READ MORE: Jussie Smollett Trial: Defense Attorney Calls For Mistrial And Accuses Judge Of Lunging At Her; Judge Denies Claims And Motion

Illinois Prisoner Review Board spokesman Jason Sweat said Tuesday that Rauner granted Thompson executive clemency on Friday.

The Innocence Project planned a 2:00 p.m. news conference Tuesday which Thompson’s nephew is expected to attend.

READ MORE: 2 Injured In Shooting On Dan Ryan Expressway Near 57th Street

Thompson died in 1996 while serving a 40-year sentence for the attempted 1981 murder of 72-year-old Ida White in Mount Vernon. In 2007 serial killer Timothy Krajcir confessed to stabbing White.

Rauner denied Thompson clemency in 2015.

MORE NEWS: Jefferson Park Homeowner Creates Visual Magic, With Huge Rotating Christmas Tree Poking Through Roof; 'Go Big, Or Go Home'

Copyright 2019 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.