One of three people charged in the death of a 15-year-old southwest Missouri girl will be sentenced in December for his role in her case.

Dallas County authorities say 40-year-old Larry Warner of Springfield pleaded guilty last Friday to endangerment and conspiracy in Khighla Parks' death in September 2012. Warner was originally also charged with second-degree murder.

KYTV reports that Warner said he took Parks and Anthony Balbirnie to the home of Amy Leigh Hartley in Buffalo but later left. Prosecutors allege Balbirnie killed Parks during sex and he and Hartley dumped her body in Truman Lake.

Balbirnie is scheduled for trial in March. Hartley is scheduled for a hearing next week on several charges, including statutory sodomy and abandonment of a corpse.

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