By David Perel - Executive Vice President/Managing Editor Radar

Kansas City Chiefs linebacker Jovan Belcher nearly cut off his thumb in an incident involving a woman years before his murder-suicide, Breaking Celebrity News is reporting.

As police, family and friends attempt to understand and find the cause behind Belcher's horrific actions Saturday when he shot and killed longtime girlfriend Kasandra Perkins, the mother of their daughter, a new police report has surfaced showing more unstable behavior.

With his horrified mother watching, Belcher kissed Perkins on the head after murdering her, as Breaking Celebrity News reported earlier. He then drove to his NFL team's facility and committed suicide in a parking lot.

Now a 2006 police report from the University of Maine Police Department has been unearthed and it shows Belcher in a violent rage over a woman.

"I responded to Andros Coggin Hall to assist UVAC for a report of a male subject with a serious cut to his arm," Sgt. Scott Curtis wrote in the official report.