New information is becoming available regarding the alleged search history of the Utah mother accused of killing her husband.

A Utah judge has denied Kouri Richins' pretrial release due to "substantial evidence" against her. The judge ruled that she must remain in custody pending the outcome of her trial due to the "uniquely dangerous nature of fentanyl." Kouri Richins faces charges of criminal homicide, aggravated murder, and three counts of possession of a controlled substance with intent to distribute. She has not yet entered a plea. The judge cited the severity of the punishment of aggravated murder and the unique nature of fentanyl as reasons for the decision. Kouri Richins' attorney, Skye Lazaro, argued there was not adequate evidence proving she had purchased fentanyl and disputed that Kouri Richins' financial troubles were a motive for her to kill her husband. The judge informed Kouri Richins she has the right to file an expedited appeal within 30 days of the ruling. The documents released Friday also give insight into Kouri Richins' defense. Prosecutors cite "incriminating evidence" and say she should be released as she awaits trial. Kouri Richins, the wife of Eric Richins, has been accused of attempting to change a life insurance policy and withdraw money from her bank accounts without her husband's knowledge. Prosecutors claim that Kouri Richins withdrew money from bank accounts without her husband's knowledge and attempted to poison him. Her lawyers argue that she had the right to withdraw money from their joint accounts and did not attempt to poison him. The autopsy and toxicology report revealed that Eric Richins, 39, had about five times the lethal dosage of fentanyl in his system. The defense claims there is no proof that Kouri gave Eric the lethal dose. The case also includes allegations of forged financial documents, with Matt Throckmorton stating that signatures on three specific documents appear to have been forged. Eric Richins made and requested several unusual choices and provisions to his estate plan, including not designating his wife as his healthcare agent and ensuring Kouri would never be in a position to manage his property after his death. Kouri Richins wrote to police clarifying information about her previous testimony, including a reference to an affair her husband had the same year she moved out.