An 81-year-old retired National Institutes of Health research chemist who worked at NIH for 40 years is awaiting sentencing after pleading guilty to soliciting a child overseas to produce sexual abuse material through live-streamed video. Carl Hammer is scheduled to appear in Montgomery County Circuit Court on Dec. 4, where he remains under house arrest ahead of the hearing.
Bethesda Magazine described Hammer as a retired NIH chemist. The Washington Post reported that he managed a mass spectrometry testing facility, worked at NIH for 40 years, published more than 75 academic papers and retired in 2017. He reached a plea deal with Montgomery County prosecutors that caps his maximum prison sentence at four years for soliciting a child to produce child pornography, even though state sentencing guidelines suggest a range of three months to four years. Prosecutors had initially secured a 12-count indictment involving a single overseas victim before agreeing to the deal.
Skype Session Became Key Evidence
The investigation included Skype records and a live-stream recording. The recording showed Hammer typing camera positioning instructions to a girl estimated to be 8 to 11 years old in the Philippines while she danced naked, per the same account. Hammer was under house arrest ahead of sentencing and declined further comment when contacted.
In Hammer's case, Montgomery County prosecutors negotiated a plea agreement that caps his maximum prison sentence at four years.
A Global Pattern Behind the Local Case
A 2023 U.S. Department of Justice report on virtual child sex trafficking describes live-streamed abuse as real-time and interactive, with viewers able to make requests. The demand driving this activity is substantial: a 2023 study by International Justice Mission and the University of Nottingham estimated that nearly 500,000 children in the Philippines — roughly 1 in 100 — were trafficked to produce new child sexual exploitation material for profit in 2022, particularly through livestreamed abuse; the measure also included recorded videos and images, with demand largely driven by Western buyers paying as little as $25 per session.
Maryland courts have seen harsher outcomes in similar cases prosecuted federally. In September 2026, 76-year-old William Foster Alger of Hagerstown was sentenced in Maryland federal court to 11.5 years in prison after admitting he paid a woman in Ecuador to produce videos sexually abusing her 7-year-old daughter, the Post reported. Alger had initially claimed his payments were intended as financial support for the family.
Not the First Case Tied to NIH
Hammer's prosecution is not the first time a former NIH-affiliated researcher in Montgomery County has faced child exploitation charges. In 2007, former NIH researcher and doctor McClellan Walther of Gaithersburg pleaded guilty in federal court to possession of child pornography after using his official NIH email address to order illicit videos online, according to the U.S. Department of Justice, which prosecuted the case under Project Safe Childhood.
An even more prominent precedent dates back three decades. In 1997, Nobel Prize-winning NIH scientist Daniel Carleton Gajdusek pleaded guilty to child sexual abuse charges.
Hammer's sentencing on Dec. 4 will determine where within that four-year cap his punishment falls.
