A Pennsylvania prosecutor says two boys charged in the killing of a 21-year-old woman boasted about wanting to kill someone and thought they were "some kind of gangstas."

Bedford County District Attorney Bill Higgins Jr. tells Tuesday's Johnstown Tribune Democrat (http://bit.ly/1BXnvgr ) the 16-year-old from Woodbury and 15-year-old from Martinsburg posed with a revolver on Facebook.

They're charged in the death of Stephanie Waters, of Roaring Spring. She was reported missing on Thursday and found dead with two gunshot wounds in her car, which was parked in the driveway of an abandoned house in Woodbury.

Higgins says the boys orchestrated a drug deal to fulfill their desire to rob and kill.

The 16-year-old is charged with homicide, robbery and other offenses. The 15-year-old is charged with conspiracy to commit homicide and other offenses.

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Information from: The Tribune-Democrat, http://www.tribune-democrat.com