Ames Nurse Practitioner and Business Owner Sentenced to Life in Prison for Sexually Abusing and Trafficking Dozens of Children and Adults

DES MOINES, Iowa – An Ames man was sentenced today to life in federal prison on each of fifteen counts of sex trafficking by fraud and coercion.

According to public court documents and evidence presented at sentencing, Carl Dale Markley, 45, from at least 2001 to April 2023, used fraud and coercion to cause dozens of teenage boys and young men, and a few young women, to engage in sex acts in exchange for money or some other benefit. Markley was a nurse practitioner in Ames and owned several businesses. Over a course of years, Markley used his professions and position in the community to befriend and gain the trust of victims, and then groom and repeatedly sexually abuse them. For a number of victims, Markley placed hidden cameras in locations to record this abuse.

Markley exploited the trust his victims placed in him. He lied to victims that sex acts and sexual contact were needed because, among other things, he was conducting research for various research institutions or sexual-health companies, his insurance company required victims to undergo physicals which he could perform, or he was obtaining advanced degrees. None of Markley’s justifications were true.

The criminal investigation into Markley’s activities began in December 2022, when the Ames Police Department received a complaint that Markley had been conducting physicals on minor male children without parental consent. Ultimately, the Ames Police Department, Federal Bureau of Investigation, and the Iowa Department of Public Safety’s Division of Criminal Investigation interviewed hundreds of victims and witnesses, completed roughly thirty-five search warrants, and obtained documents and other materials from various research institutions and sexual-health-related entities. They also seized and searched dozens of electronic devices, including seven cellphones and ten computers determined to be Markley’s and on which they located the hidden-camera materials Markley had created, internet-based child pornography, including images depicting children under the age of twelve, and other evidence of Markley’s crimes.

At sentencing, Markley continued to provide false justifications for his behavior. Chief District Judge Stephanie M. Rose described Markley’s claims as “delusional.”

In November 2023, Markley was charged with 17 federal crimes, including 15 counts of sex trafficking by fraud and coercion, one count of sexual exploitation and attempted sexual exploitation of a child, and one count of possession of child pornography. In November 2024, Markley pleaded guilty to the 15 sex-trafficking counts.

“This case is a stark reminder that those who abuse positions of trust for personal gain will be held accountable,” said Ames Police Department Police Chief Geoff Huff. “We commend the bravery of the victims who came forward and the relentlessness of our officers and partner agencies in bringing this perpetrator to justice.”

FBI Omaha Special Agent in Charge Eugene Kowel said, “Carl Markley used trust and manipulation to exert control over his victims and fulfill his criminal sexual fantasies. His young victims suffered reprehensible abuse. The FBI and our local, state, and federal partners are committed to bringing sexual predators to justice, holding them accountable for their crimes and helping to provide a path towards healing for survivors.”

DCI Assistant Director Don Schnitker said, “Today marks a significant victory in Iowa’s ongoing fight against human trafficking.  The survivors in this case showed immense bravery in coming forward, and today’s outcome ensures that Markley will never harm another person again.”

“Markley’s life sentence was absolutely warranted and necessary to permanently prevent anyone from being victimized by him again,” said United States Attorney Richard Westphal. “His defiance and failure to accept responsibility only exemplifies what a monstrous sexual predator he is. Our gratitude to the courage of the victims in this investigation and the dedication of the law enforcement personnel who identified and proved Markley’s horrendous acts of sex trafficking and abuse.”

United States Attorney Richard D. Westphal of the Southern District of Iowa made the announcement. This criminal case was investigated jointly by the Ames Police Department and the Federal Bureau of Investigation, with assistance from the Iowa Department of Public Safety’s Division of Criminal Investigation. Assistant United States Attorneys Kyle J. Essley and Amy L. Jennings prosecuted the case with the assistance of Victim Witness Specialist Charlotte Kovacs.

Human trafficking is a crime involving the exploitation of youth under the age of 18 for commercial sex; the exploitation of adults for commercial sex through the use of force, fraud, or coercion; and the exploitation of any individual for compelled labor. Human trafficking does not require the transportation of individuals across state lines, or that someone is physically restrained. Signs that a person is being trafficked can include working excessively long hours, unexplained gifts, physical injury, substance abuse issues, running away from home, isolation from others, or having a person in their life controlling them or monitoring them closely. Victims particularly susceptible to being trafficked include those with criminal histories, a history of physical or sexual abuse, uncertain legal status, and dependency on controlled substances.

Anyone who suspects human trafficking is occurring, be it a minor engaging in paid sex acts, or anyone being coerced into prostitution or labor, is urged to call the National Human Trafficking Hotline at 1-888-373-7888. If anyone has information about this case, they are urged to call the Ames Police Department, FBI, or Iowa’s Division of Criminal Investigation, or call the National Human Trafficking Hotline.