Mankato Sex Offender Pleads Guilty in Child Exploitation Case, Faces 15 Years

A 39-year-old Mankato man pleaded guilty to receiving child pornography after federal prosecutors said he spent nearly two years coercing a teenage girl into producing sexually explicit material, with the abuse only ending when officers found him inside a Mankato hotel room with the 15-year-old victim in March 2025. Alex James Wall, already a registered sex offender at the time, now faces at least 15 years in federal prison.

Wall changed his plea before U.S. District Judge Donovan W. Frank, admitting he attempted to entice and coerce a 14-to-15-year-old girl in Mankato to engage in sexually explicit conduct to produce child pornography, according to KIMT. Prosecutors said the conduct occurred between April 14, 2023, and March 6, 2025. Law enforcement officers arrested Wall inside the Mankato hotel room where he was located with the victim, according to FOX 9.

Digital Evidence Traced Abuse Back to 2023

Investigators recovered 57 videos from the victim's phone, including edited files, that helped establish the abuse began as early as April 2023, per court reporting summarized by Minneapolis News Today. FBI Minneapolis Field Office Special Agent in Charge Christopher D. Dotson said Wall recorded the abuse of a child and sexually abused and exploited the child, per the KIMT report. The Mankato Department of Public Safety investigated the case alongside the FBI, which received help from other law enforcement partners.

“The investigation demonstrates that the FBI and its partners are dedicated to finding justice for child victims and affected families,” Dotson said. U.S. Attorney Daniel N. Rosen said protecting vulnerable children is his office's highest priority, adding that Wall's guilty plea is an important step toward justice for child victims and their families.

Prior Conviction Triggers Federal Repeat-Offender Penalties

Wall's federal exposure stems in part from a 2017 Minnesota conviction for third-degree criminal sexual conduct involving a 13-year-old victim, when Wall was 28. That earlier conviction established his status as a registered sex offender and, per the same account, activated federal repeat-offender sentencing enhancements once he was charged in the current case. Dotson said repeat offenders are particularly deserving of significant consequences under federal law.

Under 18 U.S.C. § 2252A, defendants convicted of receiving or producing child sexual abuse material with a prior qualifying sex offense conviction face a statutory mandatory minimum of 15 years and a maximum of 40 years in federal prison, according to the Department of Justice. U.S. Sentencing Commission data for fiscal year 2025 shows that nationwide, federal repeat child pornography offenders subject to that 15-year minimum served an average sentence of 241 months — more than 20 years — a benchmark Hoodline has tracked in other Project Safe Childhood cases nationwide.

Federal Case Timeline and Detention

Federal court dockets show Wall was indicted in December 2025 in the U.S. District Court for the District of Minnesota under case number 0:25-cr-00461, charged with production and attempted production of child pornography, according to PacerMonitor. Assistant U.S. Attorney David M. Classen prosecuted the case under Project Safe Childhood, the nationwide Department of Justice initiative launched in May 2006 to combat child sexual exploitation.

Prior to his federal plea hearing, Wall was held on a federal detainer at the Wright County Jail as a Sherburne County federal inmate, according to local law enforcement records. Public arrest records from Dakota County also show Wall was previously arrested on July 20, 2022, by the Apple Valley Police Department, reflecting law enforcement contact across multiple Twin Cities metro and southern Minnesota jurisdictions.

This is not the first Project Safe Childhood case out of Mankato in recent years. Hoodline previously reported that another 39-year-old Mankato resident, Mitchell Ray Williams, was indicted by a federal grand jury on charges of producing, advertising, and possessing child pornography under the same initiative. Open questions remain in Wall's case, including his exact sentence length — which could reach up to 40 years — and whether additional digital evidence or victims were uncovered during the investigation.