A Kern County jury convicted David Moses, 20, and Katila Nash of first-degree murder charges. A mistrial was declared for a third defendant, Angelique Nash.
All three defendants were charged as adults, even though they were under 18 when Dorothy Session was murdered in April 2010. Katila Nash was 15 at the time of the killing.
Moses and the two Nashes were accused of using an unlocked back door in to break into Session's home on the 1500 block of Camino Sierra. They attacked Session during an attempted burglary.
The runaway teens were seen knocking on doors in the neighborhood before the attack. Authorities said that's a common tactic for burglars looking for targets, although nothing was stolen from Session's home.
Anyone who is under 18 when they commit a crime isn't eligible for the death penalty under California law. Because of special-circumstance charges, Moses and Nash could be sent to prison for the rest of their lives.
Sentencing is set for Oct. 25.
The Kern County District Attorney's office is considering whether to seek retrial of Angelique Nash.