Man sentenced to life in prison for 2015 U.S. penitentiary murder

TUCSON, Ariz. (KVOA) — A man was sentenced last week to two concurrent life terms in prison for his role in the 2015 murder of a fellow inmate at the United States Penitentiary in Tucson.

Morgan Wayne Siler, 40, of Portsmouth, Virginia, pleaded guilty in September 2024 to charges of murder and conspiracy to commit murder. U.S. District Judge Scott H. Rash imposed the sentence, which will run consecutively to Siler’s existing prison sentences for prior convictions.

Siler and co-conspirator David Hammer, another inmate, planned and carried out the murder of the victim, whose cause of death was determined to be asphyxia and blunt force trauma. At the time of the killing, Siler was already serving a sentence for assaulting a Bureau of Prisons officer in 2008 and for a series of robberies in Virginia in 2005. Hammer, who was involved in the crime, died in 2019.

The FBI led the investigation into the murder, and the prosecution was handled by the U.S. Attorney’s Office for the District of Arizona in Tucson.

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