Jill Biden’s ex-husband was arrested Monday on charges he murdered his wife in their Delaware home in December, according to a report.

William Stevenson – who was previously married to the former first lady – has been hit with first-degree murder charges for allegedly killing his current spouse, Linda Stevenson, 64 at their  house in Oak Hill, Fox 29 reported.

Cops responded to a domestic dispute call on Dec. 28 and found Linda unresponsive on the floor.

William Stevenson, who was married to former first lady Jill Biden, was arrested in connection with his wife Linda’s murder. New Castle County Police

Linda and William Stevenson in an undated photo. Facebook

She was declared dead at the scene after attempting to revive her.

Her cause of death hasn’t been released yet.

The 77-year-old husband – who owns college bar The Stone Balloon near the University of Delaware – is being held on $500,000 bail.

His arrest came after a weeks-long investigation.

Jill Biden, 74, divorced Stevenson in 1975 after a five-year marriage.

Two years later she wed then-Senator Joe Biden (D-Del.).

Stevenson has accused Jill of having an affair with the one-term Democratic president prior to their divorce. 

Stevenson and Jill Biden seen in undated photo.

Former first lady Jill Biden divorced Stevenson in 1975. Elder Ordonez/INSTARimages

Stevenson was charged with first-degree murder. The Macfarlanes / SplashNews.com

Stevenson and Jill worked on Joe Biden’s first campaign for Senate in 1972 when they both grew close to him, Stevenson has claimed. 

That same year Joe Biden’s first wife, Neilia, and their infant daughter were tragically killed in a car crash.

Stevenson said he started suspecting Joe and Jill were having an affair in 1974.

Joe and Jill claimed they first met after they were set up on a date in 1975 after Joe became a widower and Jill split with Stevenson.