OKLAHOMA CITY - The Oklahoma Court of Criminal Appeals upheld a Tulsa man's conviction for first-degree murder and his life without parole sentence.

The court rejected the appeal of 71-year-old Charles Gustaves Johnson Jr. Friday on the grounds of prosecutorial misconduct.

Johnson was convicted of killing 45-year-old Duchone Whitworth in Tulsa in 2013.

Prosecutors say Whitworth was tied to a tree, stabbed several times and his throat cut because Johnson said Whitworth owed him money.

Police say Whitworth's remains were found in the 500 block of East 66th Street North while they were investigating another crime.

The Associated Press contributed to this report.