The South Dakota Supreme Court has upheld the life prison sentence given to a man who plotted the slaying of his ex-girlfriend, a 22-year-old Rapid City woman.

Jonathan Klinetobe pleaded guilty to first-degree manslaughter in a deal with prosecutors and was sentenced to life without the possibility of parole. Klinetobe was originally facing the death penalty in connection with the fatal stabbing of Jessica Rehfeld in 2015.

Prosecutors said Klinetobe was upset that Rehfeld broke up with him and convinced two other men to kidnap and kill her.

In his appeal, Klinetobe argued the judge who sentenced him abused her discretion and that the life term violates the Eighth Amendment’s prohibition against cruel and unusual punishment, the Rapid City Journal  reported.

The justices unanimously rejected both arguments. Klinetobe convinced Richard Hirth and David Schneider to kill Rehfeld after he made up a story that the Hell’s Angels would pay an $80,000 bounty since she had information on the motorcycle gang, according to prosecutors.

After Hirth and Schneider kidnapped and stabbed her to death while pretending to give her a ride to work, Klinetobe helped them bury her body in the woods near Rockerville, officials said.

Two weeks later, he hired Garland Brown and Michael Frye to help him dig up Rehfeld’s body from the shallow grave and bury her farther into the woods and deeper underground. Everyone but Hirth has pleaded guilty and been sentenced.