BELLEVILLE, Ill. (AP) — A man sentenced to 100 years in prison for killing his girlfriend is appealing the sentence. The Belleville News-Democrat reports former Granite City resident Cory Osborne was found guilty of first-degree murder in March. He was sentenced earlier this month. The 32-year-old’s girlfriend was discovered in her car with a gunshot wound to the head two years ago. Osborne’s trial revealed he searched online to determine if a .22 caliber shot to the head could kill someone shortly after his girlfriend told him she wanted to break up. Osborne’s bail was revoked following the guilty verdict. He was taken into custody at the Madison County Jail. Court records show Osborne alleges the court overly relied on aggravating factors in determining his sentence.