Convicted attempted murder Jerry Martin, who was serving 50 years for attempted capital murder at the time of Canfield’s death, was working in an onion patch with inmate John Falk Jr. when the two overpowered a field officer in an attempt to escape. After scaling a barb-wire fence, Martin stole a truck and was driving when it struck a horse Officer Canfield was riding while trying to prevent the escape.
Canfield was thrown from the horse and hit the roof of the truck and was pronounced dead at the scene.
Martin was serving 50 years for attempted capital murder at the time of Canfield’s death.
Martin, who was the 16th inmate to be executed in Texas this year, was convicted of capital murder and sentenced to death in 2009.
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