On May 10, 1967, 11-year-old William “Billy” Hoag, a boy from Hannibal, Missouri, was last seen on the south side of the city with his 13-year-old brother, Joel “Joey” Hoag, and their 14-year-old friend, Edwin “Craig” Dowell. William was male, white, with red hair and blue eyes, and he was remembered as a child with a scar under his right arm.
That afternoon, the three boys were seen sometime between approximately 4:20 and 5:00 p.m., carrying shovels and a flashlight as they said they were going to explore Murphy’s Cave, an area near the Highway 79 construction project. The setting was the river town of Hannibal, known for its caves and for its connection to Mark Twain’s boyhood world, and the boys’ plan sounded, at first, like the kind of adventure children in that community might imagine. But William, Joel, and Craig never returned home, and the ordinary spring afternoon became the beginning of one of Hannibal’s most painful and enduring mysteries.
The day before the disappearance, William and Joel had reportedly gone to the cave without permission and had been punished for it. They were not supposed to leave their yard, but while their parents were away, the brothers left again and met up with Craig. The three boys were believed to be heading toward Murphy’s Cave, a cave entrance reportedly exposed or affected by nearby Highway 79 construction. That same day, construction work was said to have caused a cave-in at Murphy’s Cave, and because the boys had spoken of exploring the cave, authorities considered the possibility that they had become trapped somewhere underground and could not escape. The items they reportedly carried, including shovels, a flashlight, and, in some accounts, a homemade lantern, reinforced the belief that they intended to enter or investigate the cave area rather than run away.
The search that followed was extensive and urgent. Rescue workers, law enforcement, volunteers, and cave-search specialists looked through the caves and the surrounding areas, trying to find any trace of William, Joel, or Craig. The possibility of an underground accident remained central because of the terrain, the construction, and the boys’ stated destination, but no confirmed evidence was found to show that they were inside Murphy’s Cave or any other cave that was searched. Reports describe thousands of people participating in or supporting search efforts, including rescue units and speleological organizations. Despite that massive response, there was no recovered clothing, equipment, body, or conclusive sign that explained what had happened to the boys after they were last seen.
Over the years, the uncertainty allowed more than one theory to remain. One possibility is that the boys died in an accident connected to a cave, a collapse, or the Highway 79 construction site, and that their remains were never found despite the searching. Another possibility raised in later summaries is that they may not have been lost in the cave at all, and that something else happened after they left home. However, public case summaries emphasize that no conclusive evidence has established either scenario. In 2006, when construction workers building a new elementary school along Highway 79 found a small cave about 50 feet long, authorities checked it for any connection to the missing boys, but nothing was found there either. The discovery reopened hope briefly, but it did not bring the answers the families had lived without for decades.
William’s disappearance also left behind the story of a family and a community forced to carry an absence that never resolved. William and Joel were part of a large family, leaving behind five brothers and four sisters, and their family was connected to Hoag’s Tavern, a popular restaurant on Main Street in Hannibal. William attended A.D. Stowell Elementary School and was involved in the Royal Ambassadors, a youth group at his church. These details matter because they place him not only as one of “the lost boys of Hannibal,” but as a child with a school, a church group, siblings, routines, and a home that expected him back. A memorial marker later placed near the area remembers Craig, Joey, and Billy as adventurous boys who explored the hills “in the footprints of Huckleberry Finn and Tom Sawyer” and were never seen again.
William “Billy” Hoag’s case remains tied to the shared disappearance of three boys on May 10, 1967: William, his brother Joel, and their friend Craig Dowell. They were last known to be on the south side of Hannibal, Missouri, intending to explore Murphy’s Cave near the Highway 79 construction area; they carried simple tools and lights, then vanished without a confirmed trace. The immediate theory centered on an accidental entrapment or collapse, but searches did not locate them, and later checks of nearby cave spaces also failed to provide answers. The case endures as a deeply sorrowful mystery in which three children set out on what appeared to be a boyhood adventure and never came home, leaving their families and community with decades of grief, unanswered questions, and the continuing hope that the truth of what happened to William Hoag, Joel Hoag, and Craig Dowell will one day be known.Last Seen: May 10, 1967
