A suspect in the murders of a GW alumnus and his wife pleaded guilty to second-degree murder on Friday.

Prosecutors charged Piero Fuentes Hernandez, 21, in the death of Michael Spevak – who graduated from GW in 1961 – and his wife Virginia after the couple was found murdered in their Northwest D.C. home in November.

Fuentes Hernandez and alleged accomplice Angela Hernandez, 20, who is awaiting trial and is not related to Fuentes Hernandez, were arrested in early December. Angela Hernandez is scheduled to appear in court on March 20.

Fuentes Hernandez, who is an undocumented immigrant, faces at least 10 years in prison and deportation if convicted, according to the Washington Post.