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'Cold, deliberate and heinous': 17-year-old to spend decades in prison for killing Blackfoot mother

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March 5, 2026

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BLACKFOOT -- A teenager who pleaded guilty to shooting and killing a 30-year-old mother in her Blackfoot home has been sentenced to at least 24 years in prison.

Bobby Grant Jackson Jr., 17, pleaded guilty to one felony count of second-degree murder for killing Rebecca Rivera in January, as part of a plea deal.

On Wednesday, he was sentenced to 60 years in prison, with 24 years fixed and 36 years indeterminate, by 7th District Judge Daniel Clark.

“I’ve been doing this a long time, with a lot of cases of similar nature," Clark said. "This is as cold and senseless a homicide as I have ever seen."

Jackson was arrested on Oct. 23, hours after Rivera was found shot to death inside her trailer home near 1159 South Broadway in Blackfoot. The 17-year-old was accused of stealing a gun from his employer earlier in the day and was linked to the crime after witnesses told police he was in the neighborhood.

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'Cold, deliberate and heinous'Bobby Grant Jackson JrRebecca RiveraOn WednesdaySouth BroadwayBlackfoot The

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'Cold, deliberate and heinous': 17-year-old to spend decades in prison for killing Blackfoot mother · East Idaho News · Sentinel