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The lover of a Colorado dentist on trial for allegedly murdering his wife methodically by poisoning her protein shakes took the stand Tuesday, sharing details of their emotional affair.
Dr. Karin Cain, a Texas orthodontist, took the stand in the Aurora trial of Dr. James Toliver Craig, 47. Craig is charged with first-degree murder in the March 2023 death of his wife, 43-year-old Angela Craig. Her cause of death was determined to be lethal doses of cyanide and tetrahydrozoline.
Cain testified that she met Craig at a dental conference in Las Vegas in February 2023. At the time, she had just finalized her divorce after 27 years of marriage and was adjusting to life as a single mother of two adult children.
“This was the first man I had a one-on-one convo with in 30 years,” she told the jury.
COLORADO DENTIST DRUGGED WIFE YEARS BEFORE ALLEGED POISONING MURDER, FRIEND TESTIFIES
Dr. Karin Cain leaves the Arapahoe County Courthouse with a reporter after testifying in the James Craig murder trial Tuesday, July 22, 2025, in Centennial, Colo. Cain is referred to as Craig’s mistress in media reports. (Jeremy Sparig for Fox News Digital)
The two struck up a conversation while waiting for a shuttle to a conference dinner.
“He was honest and vulnerable,” Cain recalled, describing how Craig shared information about his children and about his divorce. Craig, at his time of meeting Cain in February 2023, was not divorced.
She said his sincerity made her relax, and the two shared dinner two times during the conference. Cain testified that their relationship turned physically intimate during the trip, though she insisted there was no sexual activity.
“We made out,” she said.
Afterward, she pulled back, feeling things were moving too fast.
“I told him that I wouldn’t sleep with anyone unless he was my ‘forever person,'” she told the jury. Craig told her that her boundaries were “reasonable.”
Angela Craig and Colorado dentist James Craig in a family portrait. James is charged with first-degree murder for allegedly poisoning his wife. (Faceboook)
Despite the pause, Cain said they texted and called incessantly, and the pair exchanged more than 4,000 text messages over just 18 days.
“He said things that made me feel great,” Cain admitted.
Three days into the blossoming relationship, Craig told her that he loved her.
“I’ve fallen in love with you so deeply that the list of attributes has become endless,” he wrote.
She said that his messages were often spiritual, and when they spoke on the phone, she heard him praying over his children.
James Craig talks with his family (not pictured) from his seat before the start of opening arguments in a murder trial in Arapahoe District Court July 15, 2025, in Centennial, Colo. (Stephen Swofford/Denver Gazette via Pool)
Cain admitted some of their many texts became “sexting.”
“He said, ‘I know I can be all right without you. But I don’t want to be,’” Cain recalled.
“I’m going to try to get through this day without being too turned on the whole time,” Craig wrote, according to text messages read in court Tuesday.
Cain admitted, “Yes, some texts became sexting.”
DENTIST ACCUSED OF POISONING WIFE’S SHAKE SAID HE GAVE HER ‘TOO MUCH PROTEIN’: CO-WORKER
Dr. Karin Cain leaves Arapahoe County Courthouse with a reporter after testifying in the James Craig murder trial Tuesday, July 22, 2025 in Centennial, Colo. (Jeremy Sparig for Fox News Digital)
In late February, Craig texted, “Soñar conmigo, my eternal love. May Heaven let us bloom together forever.”
Cain said their relationship felt “right,” saying she believed that James and Angela Craig were separated and close to finalizing their divorce. She said she believed James Craig was living separately in an apartment.
On Feb. 28, Craig complained Angela was upset after spotting a restaurant charge “big enough to cover two people.”
He texted, “I don’t think she understands what it means to be getting divorced.”
Cain began to worry about their relationship, texting Craig, “Maybe she’s not on the same page as you.”
“This is scary. I didn’t want to be part of breaking up a marriage,” she wrote.
Craig replied: “I didn’t tell her anything about you.”
Dr. Karin Cain, right, leaves Arapahoe County Courthouse with a reporter. (Jeremy Sparig for Fox News Digital)
When prosecutors asked if she saw any red flags in early 2023, Cain answered, “No. Not even in the days or weeks after. Now I do. But at the time? I missed it all.”
She shared her excitement with friends but kept the romance hidden from her children.
Craig frequently texted poetic love notes and confessed to past infidelity as a “mistake.”
He also told Cain, “I could see myself asking you to marry me.”
She replied, “I could see myself saying yes.”
James Craig wipes away a tear during opening arguments in his murder trial in Arapahoe District Court July 15, 2025, Centennial, Colo. (Stephen Swofford/Denver Gazette via Pool)
Cain and Craig maintained a long-distance texting relationship until Cain made plans to visit him in March. She ended up postponing her flight due to Angela being sick.
Cain’s flight was rescheduled for March 16-20, 2023.
Craig texted Cain on March 6 that Angela thought he had drugged her.
“I would never drug you,” he wrote. “Just for the record.”
Cain said that she wholeheartedly believed him. She said that Craig had told her that Angela was suicidal and “had tried to take her life before.”
VICTIM OR MANIPULATOR? COLORADO DENTIST’S MURDER TRIAL PAINTS DUELING PORTRAITS OF WIFE IN TROUBLED MARRIAGE
On March 15, Craig told her via text, “Crash. Intubated. No brain activity.”
Cain replied: “No words. I love you.”
That same day, Craig asked if she would still visit and sent a covert plan for her to attend the funeral without his children knowing.
Just before midnight, he texted, “Worst case scenario, what if they decide [that] I helped her?”
Cain reassured him, “You were at work both times she went to the ER.”
James Craig during opening arguments in his murder trial in Arapahoe District Court July 15, 2025, Centennial, Colo. (Stephen Swofford/Denver Gazette via Pool)
COLORADO DENTIST’S ALLEGED INTERNET SEARCH HISTORY TAKES CENTER STAGE AS MURDER TRIAL BEGINS
Cain flew to Colorado on March 16. She and Craig hiked, dined at a sushi spot and spent the night together.
The next day, he left to pick burial plots while she stayed behind. They met again for dinner, and he stayed in her hotel.
At 2 a.m. March 19, police knocked on her hotel door and arrested Craig.
“I told them, ‘They’re divorcing,’” Cain testified.
James Toliver Craig is pictured in a mugshot provided by the Aurora Police Department. (Aurora Police Department)
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In April, Craig began sending her handwritten love letters from jail.
“Karin, you have ruined me — ruined me in all the best ways,” he wrote. Another said, “I die a new death every day I cannot be near you.”
Cain initially burned two of the letters but then said she turned the rest of the letters over to detectives.
She wrote one final reply, “Do not write me anymore.”
Dr. Karin Cain (right) leaves the Arapahoe County Courthouse with a reporter after testifying in the James Craig murder trial Tuesday, July 22, 2025, in Centennial, Colo. (Jeremy Sparig for Fox News Digital)
On cross-examination, defense attorney David Moses pressed Cain on what she didn’t know.
She said she had no idea Craig was still living with his wife, texting other women or had hired a prostitute in Las Vegas.
“But he knew,” Moses said.
Cain replied. “Yes.”
“It was infatuation, right?” the defense asked.
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“It felt exciting, like a high school girl.” Cain said. “It felt like love.”
A prosecutor closed by mentioning Craig’s lies about still being married, still living at home and hiring a prostitute during the initial Las Vegas business trip.
“Yes,” Cain said, “a lot of what the defendant told me wasn’t true.”
Colorado dentist James Craig, right, is accused of fatally poisoning his wife and the mother of his six children, Angela Craig. (Facebook)
‘Sugar baby’ takes stand
Carrie Hageseth, a Lyft driver and single mother, testified Wednesday that she met Craig on Seeking.com and the pair fell into a “sugar babies” relationship. In a statement to Fox News Digital, a spokesperson for Seeking.com said it is not a “sugar babies” website and it “strictly prohibit(s)” any form of transactional dating.
“Our dating platform helps members build meaningful relationships based on shared ambitions and what truly makes them happy, be it romance, travel, luxury, freedom or whatever it is they aspire to in their connections,” the spokesperson said.
During one dinner, she testified, Craig referenced the movie “The Purge,” in which there is one day when everyone can kill whomever they want without consequence.
Craig, she testified, said that if he could “purge” someone, it would be his wife.
He went into detail, Hageseth testified, describing how a person could be killed via injection without consequence.
Hageseth went into the intimate details of their “arrangement,” sharing that Craig paid for her daughter’s car in exchange for sex.
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Fox News Digital has reached out to James Craig’s lead attorney, Lisa Fine Moses, for comment.