A Princeton Tragedy: Brother Accused of Killing Sibling and Cat

In a shocking turn of events near Princeton University on Saturday, Feb. 22, 2025, a tumultuous incident unfolded within the walls of the Michelle Mews Apartments, leaving a community reeling from the loss of a young life and a beloved pet. The accused, Matthew Hertgen, a 31-year-old soccer player hailing from New Jersey, faced grave charges of first-degree murder, weapons possession, and animal cruelty in connection to the deaths of his younger brother, Joseph Hertgen, 26, and a feline companion.

The Mercer County Prosecutor’s Office revealed that the night took a tragic turn when a late-night 911 call reporting a fire and a body prompted a swift response from Princeton Police. As officers arrived at the scene, they were met by Matthew Hertgen, who turned out to be the caller, standing amidst a grisly sight of injuries inflicted upon his brother and the lifeless form of a cat. The apartment setting, just off the Princeton University campus, became a scene of horror and disbelief.

A Descent into Tragedy

The Hertgen brothers, once soccer standouts in their collegiate days, traced their roots back to the Toms River area, where their shared passion for the sport bloomed into promising athletic careers. Joseph, known to friends and fans as Joe, showcased his skills at the University of Michigan from 2016 to 2019, leaving behind a legacy of dedication and talent. His high school days at Toms River North High School set the stage for a promising future, combining sports prowess with academic pursuits, as reflected in his role as an analyst at Red Bank-based Locust Point Capital.

Matthew, on the other hand, found his athletic calling at Wesleyan University in Connecticut, where he followed a similar path of soccer stardom after a successful high school career. However, the tragic events of that fateful February night shattered the facade of normalcy and unearthed a darkness that lurked beneath the surface of brotherly ties.

As the investigation unfolded, details emerged of Matthew’s arrest while in possession of a knife and a golf club, items that would later serve as evidence in a case that gripped the local community with shock and disbelief. The gruesome injuries sustained by Joseph and the cat painted a harrowing picture of violence that defied comprehension.

A Quest for Answers

While the legal proceedings loomed ahead for Matthew Hertgen, the questions surrounding the motive behind the brutal act remained unanswered. The criminal complaint, alluding to deliberate conduct leading to the death of his brother and the innocent cat, offered a glimpse into the chilling narrative that unfolded within the confines of the Princeton apartment.

With murder charges looming over him, Matthew faced an uncertain future behind bars, his fate entwined with the judicial system’s search for justice and closure in the wake of tragedy. The impending detention hearing on Thursday, Feb. 27, 2025, promised a glimpse into the legal battle that would determine the course of his life.

As the community grappled with the loss of Joe Hertgen and the unsettling nature of the crimes committed, calls for information poured in from investigators seeking to piece together the events leading up to that fatal night. The Homicide Task Force, spearheaded by Sgt. Will Jett and Detective Karl Johnston, urged anyone with relevant details to come forward, shedding light on a case that defied logic and reason.

Amidst the chaos and grief that enveloped the Princeton area, a somber reminder of the prevalence of domestic violence emerged, prompting a call to action for those in need of support and assistance. The National Domestic Violence Hotline stood as a beacon of hope for those grappling with similar challenges, offering a lifeline to those in distress.

The shadows cast by the tragedy of Feb. 22, 2025, lingered over the Princeton community, leaving behind a tale of loss, betrayal, and shattered lives. The echoes of that night reverberated through the Michelle Mews Apartments, a stark reminder of the fragility of human relationships and the darkness that dwells within us all. In the pursuit of justice and healing, the community rallied together, seeking solace in the bonds that tied them in the face of unspeakable tragedy.