A Cuban migrant held in solitary confinement at an immigration detention facility in Texas died after guards held him down and he stopped breathing, according to an autopsy report released Wednesday that ruled the death a homicide. Geraldo Lunas Campos died Jan. 3 following an altercation with guards. U.S. Immigration and Customs Enforcement said the 55-year-old father of four was attempting suicide and the staff tried to save him. But a witness told The Associated Press last week that Lunas Campos was handcuffed as at least five guards held him down and one put an arm around his neck and squeezed until he was unconscious.