The man accused of killing a cyclist on the Paul Dudley White Bike Path in Cambridge had already left one wrecked Mercedes behind before he allegedly put someone in the ground with another one. New reporting on the case of Junming Zhu raises serious questions about what Massachusetts’ system of accountability for dangerous drivers is actually accomplishing, and whether anyone in a position of authority was paying attention.
Zhu, 25, of Malden, is currently facing charges of negligent motor vehicle homicide, negligent operation of a motor vehicle, and a marked lane violation in connection with the death of John Corcoran, a 62-year-old Newton man who was riding his bicycle on the Paul Dudley White Bike Path near the Boston University Bridge on the evening of September 23, 2024. Prosecutors and eyewitnesses allege that Zhu veered off Memorial Drive and struck Corcoran head-on. Zhu has pleaded not guilty to all three charges.
What makes this case more troubling than your average vehicular homicide is the timeline. According to a police report obtained by Streetsblog Massachusetts from the Melrose Police Department, Zhu had already caused a serious two-car crash on Main Street in Melrose just seven weeks before Corcoran was killed. That crash ended with a wrecked Mercedes, a damaged BMW, and Zhu on foot half a mile from the scene, heading toward Malden. He was issued a misdemeanor citation and sent on his way.
So when Zhu allegedly climbed behind the wheel of a brand new 2024 Mercedes GLC in September, the system had already had a clear look at him and decided a summons would cover it. For Corcoran’s family, that decision proved fatal. For anyone who wonders how preventable traffic deaths keep happening in this country, this case is a fairly concise illustration.
The August Crash: A Mercedes, a BMW, and a Late-Night Walk Home
Shortly before 2 a.m. on August 3, 2024, Melrose police arrived at 288 Main Street to find two unoccupied vehicles that had been in a collision. One was a white 2023 Mercedes GLB registered to Zhu’s Malden address, with the driver’s side airbag deployed and damage to the front end, front passenger door, and front-right tire. The other was a silver BMW with damage to the left side and rear.
Officers located Zhu about half a mile from the scene, walking in the direction of Malden. He told police he had been coming from the Encore Casino, and initially denied being the driver. That story unraveled when Zhu asked police where his keys were. When officers asked whether he was looking for keys to a white Mercedes, he said yes.
The August 2 birthday detail buried in the police report does a lot of quiet work there. A man leaving the Encore Casino in the early hours of the morning after his birthday, a deployed airbag, and no apparent sobriety check. The police report contains no indication that officers investigated Zhu’s sobriety at any point during the encounter. He was cited for leaving the scene of a crash under Massachusetts General Law Chapter 90, Section 24, a misdemeanor, and that was the end of it. Until it wasn’t.
What Massachusetts Law Says About Negligent Driving
Chapter 90, Section 24 of Massachusetts General Laws covers more ground than most people realize. It is the same statute that is supposed to prohibit operating a motor vehicle “negligently so that the lives or safety of the public might be endangered.” It covers everything from leaving a crash scene to operating under the influence to outright reckless driving. The same law that produced Zhu’s misdemeanor summons in August is also the foundation for the vehicular homicide charge he now faces.
That legal overlap is worth sitting with. The framework existed to treat the August incident as a serious warning. A driver had wrecked a car in the middle of the night, apparently walked away without being tested for impairment, and was ticketed for the misdemeanor version of conduct prohibited by a statute that, in its more serious applications, is used to charge people with killing someone. The law had the tools. Nobody reached for them.
Seven Weeks Later: The Paul Dudley White Bike Path
The Paul Dudley White Bike Path runs along both sides of the Charles River and is one of the more heavily used cycling and pedestrian corridors in Greater Boston. On the evening of September 23, 2024, John Corcoran was riding his bike near the Boston University Bridge when, according to prosecutors and witnesses, Zhu veered off Memorial Drive and struck him. Corcoran, 62, did not survive.
The vehicle Zhu allegedly drove that night was a 2024 Mercedes GLC, a model nearly identical to the 2023 Mercedes GLB he had wrecked in Melrose seven weeks earlier. Different car, same lane departure, considerably worse outcome.
Zhu was charged with negligent motor vehicle homicide, negligent operation, and a marked lane violation. He has pleaded not guilty. The case remains open and is working its way through the courts.
The DA’s Office and the Question Nobody Will Answer
Streetsblog Massachusetts reached out to the Middlesex County District Attorney’s office with pointed questions: Were prosecutors aware of Zhu’s August 3 crash before the September homicide? Did Zhu face any charges beyond the misdemeanor citation? And perhaps most importantly, what policies does the DA’s office have to identify high-risk drivers and intervene before a reckless driving pattern becomes a body count?
The DA’s spokesperson declined to answer any of those questions, responding only that the case was open and referring inquiries to the court for available public records.
That non-answer is its own kind of answer. There is no shortage of data in Massachusetts on repeat traffic offenders, and prosecutors have discretion to pursue more serious charges when the circumstances warrant. Whether anyone in the system was looking at Junming Zhu between August and September 2024 is a question that, apparently, nobody in an official position wants to address. For the people who use the Paul Dudley White Bike Path every day, that silence is not exactly reassuring.