A 19-year-old man who killed his parents while his sister listened helplessly on the phone has decided to plead guilty in the double-homicide in Fairfax, Va., CNN reports.

Apparently, attorneys for Joshua Cooke had planned to argue that the teenager had confused right and wrong because he thought he was living in the virtual reality system as shown in the 1999 film "The Matrix." However, Cooke ended up admitting to killing his parents inside their home. His sister, Tiffany, was speaking to her father from Pennsylvania, when she heard the shots.

Following the shootings, Joshua Cooke hung up the phone with his sister, and called 911, telling the operator there that he "just shot my parents. I just blew them away with a shotgun."

The bodies of Paul Cooke, 51, and his wife, Margaret Ruffin Cooke, 56, were found inside the home.

Cooke faces a maximum of 20 years to life on the two murder counts. He is scheduled to be sentenced Aug. 7.

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