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Thomas Jacob Sanford, 40, was identified as the suspect in a deadly Michigan church shooting.

Sanford was a U.S. Marines veteran who served in Iraq from 2004 to 2008.

The suspect's son battled a rare disease called hyperinsulinism, leading the family to seek specialized treatment in Texas.

Michigan law enforcement authorities identified 40-year-old Thomas Jacob Sanford of Burton, Michigan as the suspect who killed four people and injured eight others when he rammed a pickup truck into a church in central Michigan and opened fire.

One of the eight injured victims is in critical condition while the seven others are in stable condition, officials said at a Sept. 28 evening news conference. More: 2 dead and 8 injured after shooting, fire at Michigan church; suspect

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