SAN FRANCISCO (CBS/AP) — Investigators looking into the death of a woman found in a stairwell at San Francisco General Hospital now have a new twist to examine: a worker reported stepping over an unconscious woman a week before her body was found.

It’s still unclear why the Sheriff’s Department did not locate the woman after hospital authorities reported the worker’s finding.

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Fifty-seven-year-old Lynne Spalding disappeared from her room Sept. 21, two days after she was admitted for an infection. Her body was found Oct. 8 in the locked stairwell.

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Her cause of death has not been determined. Investigators believe she had been dead for several days when her body was discovered.

An orderly reported seeing a woman passed out in the stairwell on Oct. 1.

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