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Tyll, circa 1985; Donald "Coco" Duvall; Raymond "J.R." Duvall; Black 1980 Ford Bronco

Missing Since 11/22/1985

Missing From St. Clair Shores, Michigan

Classification Endangered Missing

Sex Male

Race White

Date of Birth Used 08/21/1958 (62)

Age 27 years old

Height and Weight 6'2, 175 pounds

Distinguishing Characteristics Caucasian male. Brown hair, green eyes. Tyll had a beard at the time of his disappearance.

The last unconfirmed sighting of Ognjan and Tyll took place in the Houghton Lake/Mio area of Michigan on the day they vanished; they cashed a $50 check and left in Tyll's black 1980 Ford Bronco with the license plate number 447 HRZ. They never arrived at the cabin or purchased hunting licenses.

The Bronco they were driving has never been located; a photo of it is posted with this case summary. The two men were carrying $140 between them at the time of their disappearances.

In May 2003, almost eighteen years after Tyll's and Ognjan's disappearances, two brothers were arrested in connection with their cases. Police believe Raymond Wilbur "J.R." Duvall Jr. and Donald Dean "Coco" Duvall killed Ognjan and Tyll on the night they disappeared. Before their arrests, the men led a rough existence living off the Michigan woods, shooting game and sleeping in small cabins and trailers. Photographs of the Duvalls are posted with this case summary.


There is no blood or other physical evidence linking the Duvalls to Tyll's and Ognjan's presumed deaths, and their attorneys said they were being framed and the witnesses were all either lying or mistaken. The star prosecution witness admitted to having had nine alcoholic drinks prior to witnessing Tyll's and Ognjan's murders.

Nevertheless, both defendants were convicted of two counts of first-degree murder in October 2003. They were sentenced to life in prison with the possibility of parole.

Tyll was married and worked as a machinist for his father-in-law at the time of his disappearance. Foul play is suspected in his and Ognjan's disappearances due to the circumstances involved. Their cases were the subject of a 2006 book, Darker Than Night, by Tom Henderson.
Investigating Agency / Department

St. Clair Shores Police Department 586-445-5305

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