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MIT Professor Willy Ernst Fatally Shot in Cambridge; Search for Suspect Ongoing

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  Published in Science and Technology on Sunday, January 4th 2026 at 14:11 GMT by KSTP-TV

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Search Continues for Suspect in Fatal Shooting of MIT Professor Willy Ernst in Cambridge

The search remains active for a suspect wanted in connection with the fatal shooting of Massachusetts Institute of Technology (MIT) professor Dr. Willy Ernst, who was found dead at his home in Cambridge, Massachusetts, early Saturday morning. The incident has sent shockwaves through the academic community and prompted an intensive investigation by local and federal law enforcement agencies.

According to authorities, police responded to a call reporting shots fired on Vassar Street around 8:30 AM on Saturday, January 27th. Upon arrival, officers discovered Dr. Ernst, a renowned professor in MIT’s Aeronautics and Astronautics department, deceased inside his home. The Cambridge Police Department (CPD) immediately launched a homicide investigation, quickly identifying a suspect and releasing their image to the public.

The suspect is identified as Xiangxiang Li, 32, of Cambridge. Li, described by police as approximately 5’8” tall and weighing around 160 pounds, has not been apprehended. He is considered armed and dangerous, and law enforcement agencies are urging anyone with information regarding his whereabouts to contact them immediately. A significant reward is being offered for information leading to Li's arrest.

A Life of Distinction Cut Short:

Dr. Ernst was a highly respected figure within the MIT community. He held a PhD from Caltech and joined MIT in 2018, specializing in research related to hypersonic propulsion and advanced aerospace systems. His work focused on developing innovative technologies for future space exploration and national defense applications. He was known as an exceptional educator and mentor, deeply involved with his students. MIT President Susan Hockfield released a statement expressing profound sadness over Ernst’s death, describing him as “a brilliant scientist and beloved member of the MIT community.” (See MIT's official statement here: [ https://news.mit.edu/2024/professor-willy-ernst-dies-0127 ]). Colleagues and former students have shared tributes online, highlighting his kindness, intelligence, and dedication to his field.

The Suspect: A Former Student with a Troubled History?

Preliminary investigations suggest that Xiangxiang Li was a former student of Dr. Ernst's at MIT. While details remain scarce and are still being pieced together by investigators, sources indicate a possible connection between the victim and the suspect beyond a purely academic relationship. The motive for the shooting remains unclear, though police have not ruled out any possibilities, including personal disputes or professional jealousy.

Reports suggest Li was dismissed from MIT at some point, although the specific reasons for his dismissal haven’t been publicly released to protect privacy and ongoing investigation. According to court records obtained by The Boston Globe, Li had a history of minor offenses, including disorderly conduct charges in 2016. (See The Boston Globe's report here: [ https://www.bostonglobe.com/2024/01/28/metro/willy-ernst-shooting-li/ ]). This information further complicates the narrative and suggests a potential pattern of behavior that investigators are now examining closely.

The Investigation & Community Response:

The Cambridge Police Department, with assistance from the FBI and Massachusetts State Police, is conducting an extensive search for Li. A large police presence remains in the area surrounding Dr. Ernst's home, and officers have been canvassing neighborhoods, seeking information from residents. The investigation includes reviewing surveillance footage, interviewing witnesses, and analyzing forensic evidence collected at the scene.

The shooting has understandably shaken the Cambridge community. Residents have expressed shock and concern over the incident, particularly given its proximity to MIT’s campus. MIT officials have increased security measures on campus and are providing counseling services for students and faculty impacted by Dr. Ernst's death. The university is cooperating fully with law enforcement in their investigation.

Ongoing Concerns & Appeal for Information:

Authorities emphasize that the suspect, Xiangxiang Li, poses a significant threat to public safety. His history of minor offenses, coupled with his apparent connection to the victim and the violent nature of the crime, warrant immediate apprehension. Police are urging anyone who has information about Li’s whereabouts, or any details related to the shooting, to contact the Cambridge Police Department at (617) 349-3300 or submit an anonymous tip through Crimestoppers at (800) 352-TIPS.

The investigation is ongoing, and more information is expected to be released as authorities gather additional evidence and piece together the events leading up to Dr. Ernst’s tragic death. The focus remains on locating Xiangxiang Li and bringing him to justice while offering support to the MIT community and ensuring public safety.

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