On Thursday, the state's high court reversed Lovejoy's conviction and sentence, citing contradicting expert testimony over a bloody footprint.
DuPage County state's attorney Joe Birkett says even without the print evidence the evidence against Lovejoy was overwhelming.
Prosecutors argued that Lovejoy killed his stepdaughter to prevent her from testifying that he had raped her.
The state supreme court ruled Lovejoy must get a new trial.
