“Today’s crime scenes aren’t just about blood and fingerprints—they’re about data and hidden truths.”
At 87, world-renowned forensic expert Dr. Henry Lee delivered a keynote on “AI and Criminal Investigation” at the National Taiwan University Alumni Association of Southern California on July 26.
Speaking to a packed audience, he shared gripping real-life cases demonstrating how artificial intelligence is reshaping forensic science—earning him the nickname “the modern-day Sherlock Holmes.”
Data Solves, Not Noise
Dr. Lee emphasized that AI is not a threat but a precision tool.
“Think of AI as a scalpel—it cuts through lies to reveal the truth. It lets the evidence speak, not the loudest voice,” he said.
He cited a case of a missing Chinese-American student.
Police initially suspected her boyfriend, but AI analyzed thousands of surveillance clips and GPS data, identified a suspicious van, and led to the real killer—clearing the innocent boyfriend.
“AI doesn’t feel—it just follows facts,” Lee added.
Invisible Clues, Enhanced Vision
According to Dr. Lee, AI’s greatest breakthrough lies in detecting microscopic evidence.
In one case, despite a crime scene being scrubbed with bleach, AI discovered just 0.0001 milligrams of blood on a doorknob—enough to extract DNA and identify the suspect.
In another case, a woman’s death was initially ruled a suicide. Dr. Lee noticed faint bedsheet creases and subtle carpet depressions.
“Those signs pointed to a second person,” he said. With AI-assisted fingerprint and hair analysis, her ex-partner was confirmed as the killer.
Chicken Bones and Forensic Truth
Dr. Lee recalled a chilling mass murder in Chicago where seven people were killed and only a bag of trash remained. Inside were half-eaten chicken nuggets.
“Who eats fried chicken at a scene like that?” he asked.
From bite marks, he inferred the suspect’s ethnicity. Saliva traces on the nuggets led to a DNA match and an arrest.
“Crime scenes may lie. Trash doesn’t,” Lee remarked.
Microscopic Traces, Big Breaks
“Today, we don’t just bring evidence to the lab—we bring the lab to the scene,” Dr. Lee noted.
In one case, spectral analysis of paint on a truck bumper revealed faint marks matching a police uniform’s shoulder patch, solving the mysterious death of a state trooper.
In another case, a dismembered body in New Orleans had missing skin, making identification impossible.
Suspecting tattoos had been removed, Lee used AI image reconstruction to restore the tattoo.
After posting it online, the victim was identified, and a superstitious elderly woman who believed in ritual cannibalism was arrested.
Smart Devices, Smarter Justice
“AI has brought us into the era of invisible crime scenes,” Dr. Lee said.
Evidence now often comes from GPS data, app logs, smart doorbells—or even household appliances.
In one domestic violence case, the suspect claimed he wasn’t home, but smart fridge data showed the door was opened to grab alcohol during the crime window, sealing his conviction.
AI is also taking over lab tasks such as DNA analysis, ancestry tracing, and reviewing cold cases.
Tools like drones, facial recognition, and central surveillance systems have become essential for modern investigations.
AI Is Sharp—But It Needs a Conscience
Dr. Lee cautioned that while AI is powerful, it cannot replace human judgment.
“Machines are cold. Investigators must be warm,” he said.
He warned that blind trust in AI can lead to mistakes and highlighted the growing risk of deepfakes and AI-generated scams.
Lee urged for stronger ethical and legal frameworks to ensure responsible use of AI in forensics.
Mentoring Minds, Pursuing Justice
In closing, Dr. Lee called on young people to pursue careers in forensic science.
“Tomorrow’s detectives must understand blood patterns, data science, and AI—but they must also learn to question and to care,” he said.
“Solving cases isn’t about punishment—it’s about giving peace to the dead, preserving truth, and ensuring that justice leaves no regret.”
The NTUAASC held a charity book sale. Crowds gathered for Dr. Lee’s autograph and photos, creating a festive scene.
Profile | Dr. Henry C. Lee
Dr. Henry C. Lee, born in Jiangsu in 1938, is a globally recognized Chinese-American forensic scientist.
After earning a Ph.D. in biochemistry in the U.S., he served as Connecticut’s Commissioner of Public Safety and founded the Henry C. Lee Institute of Forensic Science.
Over five decades, he has worked on more than 8,000 major cases, including the O.J. Simpson trial, the Kennedy family case, the Clinton scandal, and Taiwan’s 319 shooting.
Known for his motto “Let the evidence speak,” he is celebrated for combining logic with science.
Dr. Lee has authored over 40 books and received numerous honorary degrees. He is a pioneer in modern forensic science and a mentor to generations of investigators worldwide.
