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Wyoming teen stabbed to death by bullies while protecting his girlfriend.

A pair of Wyoming teens accused of fatally stabbing a 14-year-old boy in a mall over a "blood debt" earlier this month wanted to "gut" him, police alleged.

Robert Dean Maher was allegedly stabbed in the heart and stomach at Eastridge Mall in Casper, Wyoming, April 7, according to authorities.

Dominique Antonio Richard Harris and Jarreth Joseflee Sabastian Plunkett, both 15, were arrested and charged as adults with conspiracy to commit murder, aggravated assault and battery, and theft, according to court records, the Casper Star-Tribune reported.

Plunkett is also charged with first-degree murder for Maher's death.

Police allege Plunkett was motivated to kill Maher because the victim called him and Harris "freaks" when they went into a port-a-potty together weeks prior, in an effort to escape the cold weather at a park, investigators revealed during the suspects' recent preliminary hearing. 

Since that incident, the suspects allegedly wanted to fight the victim, and Harris allegedly told police Plunkett admitted he wanted to "gut that dude," in reference to Maher, detectives said.

Weeks later, the suspects allegedly drew the victim out by following his girlfriend around the mall, prompting her to call Maher. 

He subsequently showed up at the mall to try to protect his girlfriend. The suspects allegedly approached him and brandished the knife.

"That's not fair," said Maher as he tried to back away from the situation, to which one of the teens replied, "I don't play fair," the affidavit stated, HNGN previously reported.

Harris allegedly held Maher down while Plunkett allegedly plunged the knife into him, before fleeing.

If convicted, the suspects face up to life in prison.