BAKERSFIELD, Calif. - One of three teenagers involved in the brutal beating death of an elderly woman was sentenced in court Thursday.

A judge sentenced David Moses to life in prison without the possibility of parole.

In September, a jury convicted Moses and Katila Nash of first degree murder in the 2010 killing of 81-year-old Dorothy Sessions.

She was inside her northeast Bakersfield home, cooking dinner when the teenagers broke in to burglarize the house.

When she confronted them, they brutally beat her to the point of being unrecognizable.

Despite the gravity of the case, Moses laughed, yawned and even fell asleep in his chair during his sentencing.

"It gave me the impression he thought this was just a game or something that wasn't serious. There was no expression of remorse whatsoever for his actions," said prosecutor David Wilson.

Katila Nash's sentencing has be continued to next month.

That's also when her sister Angelique Nash, who acted as the lookout during the burglary, will begin the retrial of her case.