The ex-girlfriend of undefeated boxing legend Floyd Mayweather was found dead at her California home, according to reports.

Josie Harris, 40, who had three children with Mayweather, was discovered unresponsive in her car outside her home in Valencia late Tuesday, law enforcement sources told TMZ Sports.

Officials were called to the home around 9:30 PM and when they arrived, she was pronounced dead on the scene.

It appears to be no foul play, and the case is being treated as a death investigation.

TMZ Sports reports:

Josie had a tumultuous relationship with Mayweather. He was convicted of attacking her back in a 2010 domestic violence incident and later served 2 months behind bars.

Harris claims she was abused on 6 different occasions. But, the criminal case was centered around a Sept. 2010 incident when Harris claimed Floyd entered her Vegas home while she slept, pulled her hair and then attacked her in front of their children.

Harris claimed their oldest son, Koraun, snuck out of the home and alerted a security guard to call police.

Years later, Mayweather denied the violent allegations during an interview with Katie Couric … saying, “Did I restrain a woman that was on drugs? Yes, I did. So if they say that’s domestic violence, then, you know what? I’m guilty. I’m guilty of restraining someone.”

Harris was outraged by the interview and later sued Mayweather for more than $20 MILLION for defamation. The case is still ongoing.

Harris reportedly dated Mayweather from 1995 to 2010 and was an aspiring actress. She was also in the process of writing a book to help survivors of domestic violence.

The cause of death hasn’t been revealed.

Sending heartfelt condolences to her children and the rest of her family. Rest in peace, Josie.