• The case of a Colorado dentist poisoning his wife is one of the most “gruesome, complex and calculated murders,” according to police.
  • James Toliver Craig came under scrutiny after driving his 43-year-old wife, Angela Craig, to a hospital on Wednesday night because she complained of severe headaches and dizziness, police said.
  • Her condition quickly deteriorated and medical staff placed her on a machine designed to help her breathe before pronouncing her death.
  • The hospital called the police, thinking Angela Craig’s sudden illness was suspicious.
  • They also obtained a warrant to arrest Craig on first-degree murder charges, and he was jailed on Sunday morning.

The case of a Colorado dentist poisoning his wife is one of the most “gruesome, complex and calculated murders,” according to police.

Although he seemed infatuated with his wife, police allege that James Toliver Craig put poison in her food and drink over a 10-month period.

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His sinister plot was only revealed when he drove Angela Craig to the hospital on Wednesday night as she experienced extreme headaches and dizziness.

Despite the efforts of the medical staff to save her life, they were ultimately unsuccessful and she was pronounced dead.

The hospital called the police, thinking Angela Craig’s sudden illness was suspicious.

Homicide detectives began an investigation and determined that the victim had been poisoned.

Authorities have not released details of the alleged crime, but according to court documents obtained by the Daily Beast, investigators found evidence that James Craig arranged for a canister of potassium cyanide to be sent to his office days before Angela died of suspected cyanide poisoning.

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They also claimed that he had looked for ways “to end his wife’s life… unnoticed, [provided] her toxins matching her hospital symptoms, and [worked] about starting a new life with” a lover.

Investigators allegedly found “intimate” and “sexually explicit” emails between James Craig and an orthodontist who flew into town from Austin, Texas, to see him while his wife was dying in the hospital.

They also obtained a warrant to arrest Craig on first-degree murder charges, and he was jailed on Sunday morning.

According to a work biography and video posted online, Craig is married and has six children. He said he taught as an associate professor at the University of Missouri School of Dentistry for three years and has been practicing dentistry in the Aurora area since 2006.

According to court documents, James Craig allegedly attempted to poison Angela Craig at least once about five years earlier, as he engaged in “multiple affairs with different women.”

He had also threatened suicide at the time, Angela Craig’s sister claimed.

An interview published by the Daily Beast with a person close to Angela Craig’s family added even more context.

The person, whose name has not been released, said Angela Craig had been suffering from headaches and dizziness for a few weeks and had been medically examined for symptoms at least twice before being admitted to hospital on Wednesday.

Her relatives hoped it was just a sinus infection, which she had suffered from before, but her hospitalization indicated something more serious was going on. Meanwhile, James Craig became conspicuously absent after his wife was hospitalized.

“He [had] haven’t been near the family much in the past few days, said the person who interviewed the Daily Beast. “That led to some suspicion.”

After learning that Angela Craig had been hospitalized, an employee at James Craig’s office who noticed the canister of potassium cyanide that had been delivered there worked with others to notify a nurse of the poison.

James Craig reportedly made travel plans for his mistress to visit him during three separate date ranges in March that almost perfectly matched his wife’s visits to the hospital, including the latest.

One of James Craig’s alleged emails to his mistress is said to have said, “Something happened to Angela.”

The arrest has left Angela Craig’s family struggling with “a lot of grief and a lot of anger,” the person who interviewed The Daily Beast said.

Before his arrest, Craig ran Summerbrook’s group dental practice. The group filed for bankruptcy protection on Monday, citing “unexpected financial and legal difficulties” as reasons for the closure.