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By HEATHER CLARK Associated Press Writer ALBUQUERQUE, N.M. (AP) A teenager has been charged by federal authorities with killing a nun whose body was found in her Navajo Nation home earlier this week.

Federal court documents show 19-year-old Reehahlio Carroll of Navajo, N.M. was charged with "the unlawful killing of a human being with malice aforethought." FBI spokesman Darrin Jones confirmed Carroll is accused of killing 64-year-old Sister Marguerite Bartz. She served at St.

Berard Catholic Church in the tiny town on the Navajo reservation.

Carroll was arrested Thursday and charged under Navajo law with the unauthorized use of a car that was reported stolen a day earlier.

Navajo police Capt. Ivan Tsosie says the car had belonged to Bartz.

Associated Press Writer Felicia Fonseca contributed to this report from Flagstaff, Ariz.

(Copyright 2009 by The Associated Press. All Rights Reserved.) APNP 11-06-09 1529CST | save this article / add to your favorites list