<p>PENSACOLA, Fla. — Two teenage brothers pleaded guilty to third-degree murder and arson in the slaying of their father Thursday, ending an unusual case that saw contradictory prosecutions of the boys and a family friend for the killing.</p>
<p>Derek and Alex King accepted the plea agreement following a weeklong mediation. Derek King was sentenced to 8 years in prison, his brother Alex was sentenced to 7 years in prison.</p>