PORTLAND, Ore. (AP) — A man who fatally shot his parents before killing two students and wounding two dozen others at an Springfield, Oregon, high school 20 years ago has asked the U.S. Supreme Court to review his nearly 112-year prison sentence.

The Oregonian/OregonLive reports 36-year-old Kipland P. Kinkel submitted his own typed petition to the nation's highest court in early August.

He's now being represented by two new lawyers, Thaddeus Betz of Bend, and Marsha Levick, of Philadelphia.

Betz and Levick this week filed a new habeas corpus petition in federal court in Portland, arguing that the Oregon Supreme Court got it wrong earlier this year when it upheld Kinkel's sentence and found that Kinkel is incapable of rehabilitation.

Kinkel's sentence included 25 years for his four homicides and nearly 87 years for the wounding of 24 others and attempted murder of a police detective.

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Information from: The Oregonian/OregonLive, http://www.oregonlive.com