Cold Case Files: Nearly 14 years after authorities said Joplin man drowned on Grand Lake, no body has been located
Michael Shane Chapman, a 40-year-old white man from Joplin, Missouri, disappeared on January 27, 2013, during a fishing outing on Grand Lake near Grove, Oklahoma. His boat was found the next afternoon, around 4:30 p.m., adrift near Sail Boat Bridge, and he has never been heard from again. Authorities presume he drowned, though his body has never been recovered.
He was described as 5 feet 9 inches tall, between 175 and 250 pounds, with long black hair, a long black-and-gray goatee, and brown eyes. He had tattoos on his upper chest, both arms, and back, and was last known to be wearing a black hoodie, blue jeans, and tennis shoes.
Public details about Chapman’s life are limited. No occupation, family status, or other personal background has been widely reported, which leaves his circumstances somewhat opaque. He traveled roughly an hour and a half from Joplin for a solo winter fishing trip on a large lake. The distinctive appearance would have made identification straightforward if remains had been found, yet nothing has turned up.
Grand Lake covers about 46,000 acres with variable depths and many coves. The initial search covered roughly a 10-square-mile area from Sail Boat Bridge toward Patricia Island and the East Bay. Grand River Dam Authority Police used helicopters, boats, and later sonar-equipped vessels. Officials have stated they believe the body remains somewhere in the lake.
Recovery was complicated by the lack of witnesses to the exact point where he entered the water.
The boat had drifted by the time it was found, making reconstruction of the entry point difficult. January conditions included wind, wave action, and stormy weather that delayed searches. Nearby weather data show mild air temperatures on January 27, with a high around 62 degrees, but lake water remains cold enough in winter for rapid hypothermia. Cold water also slows the normal floating cycle of a body.
Remains can sink, snag on underwater debris, or be carried farther by currents and wind. Large reservoirs frequently fail to yield bodies even after extensive searches.
Grand River Dam Authority Police in Langley, Oklahoma, lead the investigation. Contact is (918) 530-0123 or bedwards@grda.com. Case references include 0313139-012 and 2014GRDAPOLICE-0178. Searches began the evening the boat was recovered and continued the following days, with weather delays.
In a 2014 Tulsa World report, GRDA Police Chief Brian Edwards stated that no foul play was suspected and that the case remained open while searches continued
A 2015 report noted ongoing sonar work.
The case was entered into NamUs in March 2013 and remains open. As of a 2025 Delaware County missing-persons listing, Chapman was still among the unresolved cases with no body recovered.
The official position is accidental drowning, possibly from a slip, medical event, or conditions on the water while fishing alone. No evidence of foul play has been publicly reported, and authorities have explicitly stated they do not suspect it. Speculative alternatives include suicide, though no note, prior statements, or mental-health indicators appear in the public record, or foul play staged as an accident
. An empty boat and unrecovered body can invite such theories, but GRDA treated the case as a drowning, found no supporting evidence of crime, and continued lake-focused searches. No public reports of enemies, disputes, or inconsistent statements appear in coverage.
The absence of a body despite targeted searches, the drifting empty boat, winter conditions that hinder recovery, and the thin public record on Chapman’s personal life are the main elements that sustain interest, though the documented investigation has not produced indications of anything other than a tragic accident on the water.
The case remains open with GRDA Police as a presumed drowning. No resolution or identification of remains has been reported in available sources. Anyone with information is directed to GRDA Police.
