The ex-husband of former first lady Jill Biden has been arrested in connection to the December killing of his wife, police in Delaware said.

William Stevenson, 77, was indicted on Feb. 2, on charges of first-degree murder of 64-year-old Linda Stevenson, the New Castle County Police Department said in a news release.

Police did not say how Stevenson's wife died, but according to the release, he was arrested following "an extensive weeks-long investigation" into the death of his wife after officers responded to a domestic dispute on Dec. 28 at a home in the Wilmington area.

According to the release, the woman was found unresponsive in her Elsmere-area living room at the scene.

After a grand jury indicted him on the felony, police said officers arrested Stevenson at his home without incident.