Mark Trent vanished in 2016, leaving behind his dogs and possessions before investigators eventually traced his death to a former roommate.
MUNCIE, Ind. — For years, Mark Trent’s family did not know what had happened after he disappeared from his Muncie home in early 2016, but a relative’s renewed call to investigators eventually helped reopen the trail that led to his remains and a 69-year prison sentence for Ian Shelden.
The case ended its latest chapter Aug. 5, when Shelden, 46, was sentenced after a jury convicted him of murder, obstruction of justice and auto theft. Trent was 55 when he died. The verdict came April 30, nearly 10 years after Trent’s relatives first reported him missing and more than four years after prosecutors filed an Indiana murder case. What began as uncertainty over whether Trent had deliberately cut off contact evolved into a homicide investigation through a combination of family persistence, financial records, interviews in Tennessee, Shelden’s own statements and the eventual recovery of Trent’s bones.
The first clues were unsettling because they did not fit neatly together. Trent’s family had last seen him about a month before they went to his home with police on March 31, 2016. Many of his belongings were still there. His two dogs remained at the residence. His pickup truck was missing. Ian and Tracy Shelden, who had been staying with Trent, were no longer there either. Neighbors told investigators that the couple appeared to have departed quickly. At about the same period, a post appeared on a social media account associated with Trent saying he was reevaluating his life and stepping away from people. The message suggested a voluntary disappearance, but what the family found at his home raised doubts.
The doubts grew as investigators examined Trent’s finances. His accounts continued to be used after he disappeared, with withdrawals occurring from March through August 2016 in multiple states. Surveillance footage from ATMs showed that Trent was not the person taking out the money. The transactions crossed Indiana, Tennessee, Florida and Michigan, according to the investigative record reported in the case. That gave authorities evidence that someone had access to Trent’s money after he vanished, but it did not answer the most important question: whether Trent was alive. Without a body and without a definitive account of his whereabouts, the case remained unresolved.
Years passed before Trent’s niece supplied the information that pushed investigators back toward the Sheldens. In October 2021, she told authorities she believed Ian and Tracy Shelden knew something about her uncle’s disappearance. Police tracked the couple to Tennessee. The renewed contact mattered because the Sheldens had been linked to Trent’s household before he vanished and had left Indiana around that period. Instead of a cold financial trail, investigators now had two people they could question directly about their movements, their last contacts with Trent and the missing truck.
Tracy Shelden’s interview gave detectives several new points to compare with evidence already in the file. She said she and Ian Shelden had once lived with Trent but left after the relationship among them deteriorated. She recalled returning to Trent’s residence with her husband after they had moved out. Ian Shelden went inside while she waited in the vehicle, she told investigators. When she next saw him, he had Trent’s truck. She also identified him as the person seen in ATM surveillance footage using Trent’s account after Trent disappeared. Her statements did not by themselves establish every element of the later murder case, but they gave investigators a direct link between Shelden, Trent’s missing vehicle and the unexplained banking activity.
Ian Shelden did not initially give investigators the account that would later become central to the prosecution. According to the probable cause affidavit, one explanation was that Trent had died from a drug overdose while traveling in Tennessee and that Shelden had panicked and tried to hide what happened. He took officers to a location where he claimed he had left Trent, but no remains were found there. Investigators continued pressing for answers. The failure to find Trent at the first location left police with another contradiction rather than a resolution, and the changing stories became part of the investigation that eventually preceded the murder charges.
Shelden later said the death occurred at Trent’s home in Muncie. In that account, he said he and Trent had been using crack cocaine and described a confrontation in a bedroom. Shelden alleged that Trent made an unwanted advance and grabbed his belt loop as Shelden tried to leave. Shelden told investigators that he picked up a long, heavy tent stake and struck Trent multiple times. Authorities described those statements as a confession. The probable cause filing also attributed to Shelden a detailed account of efforts to clean the residence afterward, including removing bloodied carpet and replacing it with another section. Prosecutors later relied on the overall sequence as evidence of both the killing and an effort to conceal it.
The account then moved beyond the house. Shelden said he used Trent’s debit card to buy a large tote at Walmart, returned to the residence and placed Trent’s body inside it. He also took Trent’s vehicle, according to the affidavit. He told investigators that he traveled to Tennessee, where he unsuccessfully tried to burn the remains before leaving them below a mountain overhang. The court record contains disturbing details about the disposal, but the central investigative fact was simpler: authorities were eventually able to move from Shelden’s statements to a physical location where human remains could be recovered.
At a later site identified during the investigation, authorities found a bag containing bones. Forensic examination determined the remains belonged to Trent. A medical examiner concluded that he died from blunt-force injuries to the head, according to reporting based on the probable cause affidavit. That finding gave investigators something the family had been missing since 2016: confirmation of Trent’s death and a physical basis for treating the case as a homicide. It also supported the portion of Shelden’s later statement in which he described striking Trent in the head.
Prosecutors formally charged Shelden in Indiana on Feb. 17, 2022. The filing contained two murder counts under separate legal theories, obstruction of justice, auto theft, fraud and theft. Delaware County Prosecutor Eric Hoffman explained at the time that the two murder counts referred to the same victim and did not allege two killings. Shelden was then held in Tennessee on an abuse-of-a-corpse allegation while authorities worked to bring him back to Indiana. The case eventually reached trial in April 2026. After proceedings that began April 27, jurors returned guilty verdicts April 30 on murder, obstruction of justice and auto theft.
The sentence imposed Aug. 5 placed a final number on the Indiana jury’s verdict: 69 years in prison. Hoffman said after sentencing that investigators and prosecutors had continued working despite the years that separated Trent’s disappearance from the prosecution. He credited members of his office, sheriff’s investigators, detectives and a victim advocate for their work. The statement reflected an unusual feature of the case: the critical break did not come immediately after Trent disappeared but after a relative again directed investigators toward people who had been connected to him before he vanished.
For Trent’s family, the public record charts a progression from uncertainty to confirmation. The dogs and possessions left behind in Muncie first made his disappearance difficult to explain. The financial transactions suggested someone else was using what he left behind. A niece’s call years later revived attention on the Sheldens. Interviews produced admissions that led investigators toward physical evidence, and the recovered remains established what had happened to Trent. Shelden’s 69-year sentence now stands as the principal current status of the Indiana prosecution, nearly a decade after Trent’s family first sought answers about his absence.
Author note: Last updated September 20, 2026.