A dozen what ifs fell into place, each decision another step toward tragedy in Chickamauga, Ga.

photo Jason Westbrook holds his father Ronald Westbrook's medical I.D. bracelet that he says his father was wearing when the Alzheimer's patient was shot and killed in the yard of a house in Chickamauga, Ga., on Nov. 27.

CHICKAMAUGA, Ga. - Deanne Westbrook woke up around 5 a.m. on Nov. 27, alone. At some point in the morning, she thought, her husband must have sneaked out of bed.

She searched the house for him.

Ever since Ron Westbrook, 72, started showing signs of Alzheimer's disease three years ago, Deanne had grown used to looking after him, keeping the former Air Force lieutenant colonel in her sights.

Earlier this year, Deanne stopped him as he tried to go out for a walk in the middle of the night.

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