The Murder of Jocelyn Peters: A Teacher’s Life Cut Short

A Dedicated Detective’s Unwavering Commitment

When retired St. Louis Police Department detective Mark Biondolino began investigating the murder of Jocelyn Peters on March 24, 2016, he made a personal commitment to see the case through to its conclusion. Even after retiring, Biondolino remained deeply connected to the investigation, driven by a sense of responsibility that he believes comes with working homicide cases. His dedication would prove crucial in unraveling a complex murder-for-hire plot that shocked the St. Louis community. The case would take him and his colleagues through eight years of painstaking investigation, revealing a chilling story of betrayal, greed, and calculated violence that ended the life of a beloved teacher and her unborn child.

Jocelyn Peters, a 30-year-old third-grade teacher, was found murdered in her second-floor apartment in St. Louis’s historic Central West End neighborhood. She had been killed while sleeping in her bed sometime between 3:00 and 3:40 a.m. The building’s security was notably tight, with non-duplicable keys required for entry, making unauthorized access nearly impossible. When her boyfriend, Cornelius Green, returned from a three-day trip to Chicago, he discovered her body and called 911 at precisely 3:19 p.m. His call to Jocelyn’s mother, Lacey Peters, delivered the devastating news that would shatter their family forever.

A Crime Scene Full of Mysteries

The crime scene presented investigators with several puzzling elements that would become crucial to solving the case. There were no signs of forced entry or struggle in the apartment, which appeared undisturbed except for the bedroom where Jocelyn lay deceased from an apparent gunshot wound to her eye. A single shell casing from a .380 caliber semi-automatic pistol was found near the nightstand, and Jocelyn’s cellphone was missing. But the most unusual piece of evidence was something investigators had never encountered before: potato fragments splattered throughout the bedroom, on the headboard, around Jocelyn’s head, on her pillow, and near where she had been shot.

Detective Biondolino and his team theorized that the potato had been used as a makeshift silencer for the gun. This dangerous technique, while risky for the shooter, appeared to have been effective—no neighbors reported hearing a gunshot that night, and no calls about gunfire came in around the time of the murder. The use of such an improvised silencer suggested premeditation and a desire to avoid detection. Investigators also discovered a bag of potatoes on Jocelyn’s dining room table, which seemed out of place given her carefully planned, health-conscious diet. She was seven months pregnant and had been meticulous about her nutrition, with a weekly menu posted in her apartment that never included potatoes.

A Beloved Educator with Dreams for the Future

Jocelyn Peters was more than a murder victim; she was a vibrant, dedicated educator who had made teaching her life’s mission. After graduating from college, she pursued her passion for education at Mann Elementary School, where she taught third grade alongside her friend Tierrus Tucker. Nicole Conaway, the school’s former principal, remembered hiring Jocelyn after just 15 to 20 minutes of interviewing—the teacher’s enthusiasm and commitment to caring for children were immediately apparent. Jocelyn was particularly focused on addressing inequities in St. Louis public schools, where 80 percent of elementary schools lacked full-time art, music, or physical education teachers.

In 2014, Jocelyn received the prestigious Pettus Excellence Award, recognizing her outstanding work in the classroom. By spring 2016, she was also fulfilling personal dreams. She was seven months pregnant with a baby girl she had named Micah Leigh, and she appeared to be in a committed relationship with Cornelius Green, who was also an award-winning educator and a middle school principal. The couple had been together for five years, and Cornelius was the father of her child. However, beneath the surface of this seemingly happy relationship, tensions were building. Jocelyn had grown frustrated that Cornelius wasn’t as eager as she was to buy a house together, and she had recently turned 30, feeling ready to settle down and start the family life she had always wanted.

Just a week before her murder, Jocelyn had taken a belated birthday cruise to the Bahamas with her family and Cornelius to celebrate her milestone birthday. Her mother Lacey and aunt Dedra noticed something was off with Cornelius during the trip—he seemed distant, empty, and unattentive to Jocelyn’s needs despite her being visibly uncomfortable in her pregnancy. This marked change in his demeanor would later seem ominous. What Jocelyn’s loved ones didn’t fully know was that Cornelius had a complicated personal life: he was still legally married to a woman named Steffanie, with whom he had a young daughter, though the couple had been separated for years.

Unraveling the Web of Deception

As investigators dug deeper, the evidence began pointing toward a carefully orchestrated murder-for-hire plot. Surveillance footage from outside Jocelyn’s apartment captured a white sedan similar to Cornelius Green’s white Kia Optima near the building shortly after 3:00 a.m. on the morning of the murder. When questioned at police headquarters, Cornelius was eager to establish his alibi, showing investigators his Amtrak ticket and being unusually specific about the time his train arrived back in St. Louis—2:57 p.m., nearly 12 hours after Jocelyn was killed. However, when asked for permission to search his car, Cornelius became agitated and refused, saying he felt like he was being treated as a criminal.

Cornelius revealed that he had loaned his car to a childhood friend named Phillip Cutler, who had been visiting from Oklahoma. After the interview, Cornelius made phone calls that were inadvertently recorded by the still-active interview room camera. He urgently instructed Cutler to retrieve his car from a specific address and arranged for his estranged wife Steffanie to meet Cutler with the keys near a distinctive Amoco gas station sign. Police intercepted both Cutler and Steffanie at this meeting point and brought them in for questioning.

When Phillip Cutler was interviewed, he claimed he had never met Jocelyn and had no idea where she lived. But surveillance cameras caught him doing something extraordinary while alone in the interview room: he tore pages from his notebook and ate them. Though investigators didn’t witness this in real time, the footage would later prove significant. Cutler denied any involvement in the murder and suggested that someone might have stolen Cornelius’s car and returned it. Despite the growing suspicion, investigators didn’t have enough evidence to hold him, and he was released—but not before providing his phone number, which would prove to be a critical mistake.

Digital Evidence Cracks the Case Wide Open

The investigation took a decisive turn when detectives obtained warrants to examine the digital records from both Cornelius Green’s and Phillip Cutler’s phones. The data revealed a text message conversation from nearly a month before the murder that appeared to be planning something sinister. Cornelius had invited Cutler to visit during spring break, specifically the week of March 20th. Cutler’s response included a cryptic question: “u gonna b sending the package?” To investigators, this looked like a clear quid pro quo arrangement—Cutler would come to St. Louis, and Cornelius would send him something in return.

Further investigation revealed that Cornelius had indeed mailed a UPS package to Cutler’s address in Muskogee, Oklahoma. The overnight envelope weighed several ounces, cost $48 to ship, and required a signature upon delivery. Cutler had signed for it weeks before Jocelyn’s murder. When later questioned about the package’s contents, Cutler admitted it contained $2,500 in cash. This money, investigators discovered, had been stolen from Carr Lane Middle School, where Cornelius was principal. The cash had been raised by students on the school’s dance team through three separate thefts totaling $2,700—money to which Cornelius had direct access.

The most damning evidence came from Cutler’s Google location history. The data created what Detective Biondolino called an “electronic eyewitness,” showing Cutler’s phone pinging directly inside Jocelyn’s apartment between 2:59 and 3:48 a.m. on the morning of her murder. Hours after the killing, his phone tracked to North Riverfront Park, a location along the Mississippi River about 10 miles from Jocelyn’s building, where investigators believe he disposed of the murder weapon and Jocelyn’s missing cellphone. Surveillance video from the ALDI supermarket four days before the murder showed Cornelius and Jocelyn shopping together, with a 10-pound bag of russet potatoes prominently displayed on top of their grocery cart—linking Cornelius directly to the unusual evidence found at the crime scene.

Justice Delayed but Finally Served

In June 2016, Detective Biondolino obtained a warrant for Phillip Cutler’s arrest and traveled to Muskogee, Oklahoma, to take him into custody. Cutler maintained his innocence, claiming someone else must have used the car or that it had been stolen and returned. He was transported back to St. Louis and held in custody. Two months later, in August 2016, Cornelius Green was arrested for the theft of the dance team funds. He posted bail and was removed from his position as school principal. Then, in October 2016, Cornelius was arrested and charged with the murders of Jocelyn Peters and their unborn daughter, Micah Leigh. His wife subsequently filed for divorce, though investigators confirmed she had no involvement in the murders.

Despite the arrests, the case languished in the backlogged St. Louis Circuit Attorney’s Office for years, causing immense frustration for Jocelyn’s family. It wasn’t until 2022 that the U.S. Attorney’s Office reviewed the evidence and recognized it as a classic federal murder-for-hire case. The interstate element—Cutler traveling from Oklahoma to commit the murder, and Cornelius mailing money across state lines—gave federal prosecutors the jurisdiction they needed. Assistant U.S. Attorney Tiffany Becker took on the case, preparing to present evidence that Cornelius had become increasingly desperate to escape his relationship with Jocelyn.

The investigation revealed that Cornelius had searched the internet for ways to terminate a pregnancy, looking up abortion medications and how to conceal them in food or drinks. Though there was no evidence he acted on these searches, prosecutors believed he wanted out of the relationship and feared the financial obligation that baby Micah Leigh represented. Investigators also discovered that Cornelius had purchased a .380 semi-automatic pistol years earlier—the same caliber as the shell casing found in Jocelyn’s bedroom—though the weapon itself was never recovered.

On February 28, 2024, just two weeks before his scheduled trial and eight years after Jocelyn’s murder, Cornelius Green pleaded guilty to federal charges of conspiracy to commit murder and murder itself. His attorneys explained that the decision was influenced by the fact that state prosecutors had been seeking the death penalty. By pleading guilty in federal court, Green avoided that possibility while sparing both families the trauma of a trial. After his plea, the state dismissed its murder and theft charges against him.

Phillip Cutler, however, chose to go to trial. He took the stand in his own defense, claiming that the notebook pages he had swallowed in the interview room contained only the name and number of someone he was buying marijuana from. The jury wasn’t convinced. After hearing all the evidence—the text messages, the package containing cash, the Google location data placing him at the murder scene, and the surveillance footage—they found Cutler guilty. Both Cornelius Green and Phillip Cutler were sentenced to two consecutive life terms for the murders of Jocelyn Peters and Micah Leigh, ensuring they would never walk free again.

Jocelyn’s loved ones experienced mixed emotions at the conclusion of the case. While grateful for justice, they struggled with how long it had taken and with the senselessness of losing someone so vital and caring. Jocelyn’s students dedicated a memorial bench at Mann Elementary School in her honor, ensuring that her legacy as an inspiring educator would endure. Her friend Tierrus Tucker expressed a desire to understand why Cornelius committed such a monstrous act, calling him “the worst kind of monster” because he had presented himself as something entirely different. Jocelyn’s aunt Dedra found comfort in faith, believing that Jocelyn and baby Micah were together in heaven, where Jocelyn could continue her calling to teach, educate, and inspire—this time among angels.