TWIN FALLS, Idaho (AP) — A 20-year-old Twin Falls man has reached a plea agreement in the August 2011 death of his fiancée's 3-year-old son. The Times-News reports (http://bit.ly/Uj770M ) Lane Alan Buddenhagen was originally charged with first-degree murder, but the charge was amended to voluntary manslaughter in the plea agreement reached Friday. An amended indictment alleged the boy sustained a catastrophic brain injury while in Buddenhagen's care, but that the death was not premeditated. Prosecutors will ask for a maximum of 10 years fixed prison time for Buddenhagen when he is sentenced on Nov. 2.