Man is convicted in 2010 Dibble triple slaying

A jury in McClain County took less than four hours to convict Shaun Michael Bosse in the July 2010 triple slaying of a woman and her two children in Dibble, a small Oklahoma town.
by Andrew Knittle Published: October 29, 2012
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A jury in McClain County took less than four hours to convict Shaun Michael Bosse in the July 2010 slayings of a woman and her two children in the small town of Dibble.

The bodies of Katrina Griffin, 25, Christian Griffin, 8, and Chasity Hammer, 6, were found July 23, 2010, in their badly burned mobile home after a neighbor noticed smoke billowing out of it that morning.

The jury — made up of nine women and three men — will recommend a sentence on the three murder counts Tuesday morning in McClain County District Court. Prosecutors are seeking the death penalty in the case.

Bosse, 30, also was convicted Monday of first-degree arson, with a recommendation of 35 years on the lesser charge.

McClain County District Attorney Greg Mashburn said he felt a combination of physical evidence and a strong circumstantial case led the jury to a guilty verdict for Bosse.

Mashburn also gave credit to the Bureau of Alcohol, Tobacco, Firearms and Explosives for conducting extensive recreations of the fire he claims Bosse set to cover up his crimes.

“There were a lot of pieces to this puzzle, and the physical evidence played into that and were major pieces to the puzzle,” Mashburn said.

The crime

Prosecutors theorized that Bosse killed the family after Katrina Griffin discovered that he was stealing their personal property.

Katrina Griffin died of stab wounds, according to testimony from the state medical examiner. Christian Griffin died the same way, in the same room as his mother.

Chasity Hammer died after being locked in a closet, shortly before Bosse set the mobile home on fire, prosecutors said. When her body was recovered, her lungs were full of soot and other toxic substances, the medical examiner testified earlier in the trial.

Katrina Griffin and her son died in another bedroom, where Mashburn said they were most likely chased by Bosse during the attack.

Prosecutors said that a broken knife found at the scene belonged to Christian Griffin and that they believe he was trying to protect his mother when Bosse stabbed him to death.

Once Katrina and Christian Griffin were dead or dying, prosecutors say Bosse turned his attention on Hammer, the youngest and most vulnerable victim.

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by Andrew Knittle
Investigative Reporter
Andrew Knittle has covered state water issues, tribal concerns and major criminal proceedings during his career as an Oklahoma journalist. He has won reporting awards from the state's Associated Press bureau and prides himself on finding a real...
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