An Army soldier accused of strangling his pregnant wife so he could pocket $500,000 in benefit money was convicted Thursday by a military judge in a case that hinged on dueling medical experts who couldn't agree on how the woman died.Pvt. Isaac Aguigui, 22, of Cashmere, Wash., was sentenced to life in prison with no chance of parole at the end of his four day court-martial at Fort Stewart. A military judge found him guilty of murder and causing the death of an unborn child.