A former commanding officer of the U.S. Navy base at Guantanamo Bay, Cuba, has been charged with with obstruction of justice and other offenses relating to the 2015 death of a civilian employee, federal prosecutors announced Wednesday.

According to court documents filed in Florida federal court, Capt. John R. Nettleton faces two counts of obstruction of justice, one count of concealment of material facts, two counts of falsification of records and five counts of making false statements to investigators looking into the death of Christopher Tur. According to the indictment, Tur disappeared on the night of Jan. 9, 2015 after attending a party at which he accused Nettleton of having an affair with Tur’s wife. Tur’s body was found in the waters of Guantanamo Bay two days later, on Jan. 11.

Prosecutors claim Nettleton lied to investigators about an affair with Tur’s wife, as well as getting into a physical altercation with Tur following the party. The indictment also says that investigators found a paper towel stained with Tur’s blood near a pier in Nettleton’s backyard on the base. According to the document, Nettleton was close by when investigators recovered the paper towel and told them, “That’s probably nothing.” Investigators later found bloodstains that matched Tur’s DNA in Nettleton’s home.

An autopsy found that Tur, 42, died from drowning but that he had broken ribs suffered before he went into the water and a cut to his head.