The girlfriend of a former Texas judge who died from a fentanyl overdose has been charged with murder for allegedly giving him the deadly drugs.

Kami Ludwig, 35, was arrested Monday and is accused of buying fentanyl-laced Xanax pills, cocaine and other illegal narcotics that led to the November death of former Associate Tarrant County Judge William Shane Nolen.

The 47-year-old dad’s 9-year-old son was in the home at the time of his fatal overdose.

Ludwig faces counts of murder and possession of a controlled substance, Grapevine police said.

The woman’s arrest more than three months after the judge’s fatal overdose stems from a new state law that went into effect in September, creating a criminal offense of murder for supplying fentanyl that results in death.

“They found evidence that she sought out the pills,” Amanda McNew, with the Grapevine Police Department, told Fox 4 News. “She bought them and brought them back to the victim. He took them, and he died.”

Ludwig allegedly procured the drugs from dealers in Fort Worth, Texas, and Louisiana.

On Nov. 20, 2023, police officers in Grapevine, Texas, responded to a home for a death investigation.

They found Nolen dead from a suspected opioid overdose in his bedroom while his young son was in the home.

Several pills marked “M-30” were found scattered nearby.

Detectives also seized 40 blue fentanyl-laced pills, cocaine, oxycodone and Xanax from Ludwig’s purse, according to an arrest affidavit.

Ludwig, who placed the 911 call, claimed that she woke up before dawn to find Nolen unresponsive next to her and ran to a neighbor’s home for help.

A search of Ludwig’s phone allegedly revealed that she had obtained the drugs from suspected dealers identified as “Blue” and “T.”

Ludwig allegedly messaged “T” to ask if she could travel to their Fort Worth home, which she did on Nov. 19 based on her cellphone location data, according to the affidavit.

She also allegedly received a package from Louisiana containing an Apple iPhone box with Xanax pills inside.

Nolen’s autopsy found that he died from a combination of fentanyl and the antidepressant Trazodone.

Police obtained an arrest warrant for the murder charge against Ludwig last week, and she turned herself into the authorities Monday. 

She has since been released from jail on a bond.

“Fentanyl murder is a serious accusation, and judgment should be withheld until all the facts and circumstances are known,” Ludwig’s defense attorney, Tiffany Burks, told Fox 4.

“We proudly defend Kami as she, too, struggles with the loss of a beloved friend.”

Cops are still trying to track down the dealers who provided the fentanyl.