Former Froedtert Hospital transplant surgeon Calvin M. Eriksen has been sentenced to six years in federal prison after pleading guilty to possession and distribution of child pornography. The 47-year-old Brookfield resident received a 72-month federal term on Thursday, along with seven years of supervised release and a requirement to register as a sex offender. Court records indicate he will report to the Federal Bureau of Prisons following processing.
According to the Milwaukee Journal Sentinel, Eriksen pleaded guilty in October to federal charges of possessing and distributing child sexual abuse material. Court documents cited by the publication indicate that search warrants executed at his home and workplace uncovered files containing images and videos depicting the abuse of infants and toddlers. Prosecutors stated that Eriksen exchanged sexually explicit messages with an individual he believed to be the mother of an 8-year-old and took actions to obtain and share illegal material.
How investigators say the probe began
Authorities say the investigation began when an undercover Homeland Security Investigations agent in West Palm Beach joined online chat rooms posing as a woman with an 8-year-old daughter and communicated with a user who claimed to be a surgeon in Wisconsin, as per FOX6. Federal filings and local reports indicate the user sent a nude photo and later shared files in group chats, prompting cyber tips to the National Center for Missing & Exploited Children. Those tips helped investigators identify a Kik profile linked to the illicit material.
Workplace links and evidence recovered
Search warrants executed at Eriksen’s Brookfield home and workplace uncovered hundreds of images and dozens of videos, according to court filings. Forensic analysis linked several file transfers to IP addresses associated with Froedtert Hospital, as well as locations in Milwaukee and nearby New Berlin. Homeland Security Investigations and the Brookfield Police Department collaborated on the multi-jurisdictional investigation, which progressed from online chat rooms to real-world searches.
Sentence, prosecution and penalties
On Thursday, a U.S. District Court sentenced Eriksen to 72 months in federal prison. In addition to his prison term, he must serve seven years of supervised release and is required to register as a sex offender, according to the Milwaukee Journal Sentinel. Court records show he was arrested near his Brookfield home in July 2024 and pleaded guilty in October. Federal prosecutors charged him with distribution and possession of child sexual abuse material, offenses that carry substantial penalties.
Legal context
Under federal law, distribution of child sexual abuse material carries a mandatory minimum sentence of five years, with longer terms possible in aggravated cases. Eriksen’s case was handled under Project Safe Childhood, a U.S. Department of Justice initiative that coordinates federal, state, and local efforts to combat online child exploitation. Upon release, he will be under federal supervision and required to comply with state and federal sex offender registration requirements.
Froedtert and the Medical College of Wisconsin removed Eriksen from clinical duties and removed his information from hospital directories once the investigation became public, according to local reports. Law enforcement officials note that the case demonstrates how cyber tips and coordinated investigations can turn anonymous online activity into traceable evidence. Authorities continue to encourage anyone with information about child exploitation to contact federal law enforcement tip lines.
