By Nicole Perez - Executive Producer KSAT ABC-12.

SAN ANTONIO - It has been 23 years since burglars shot and killed James Fogle, an on-duty security guard at a South Side Walmart. The people responsible have never been caught.

San Antonio police have reopened the case in hopes of finding Fogle's killer.

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The first steps to warming up a cold case: taking a fresh look at old evidence.

The only witness

The evening of Jan. 20, 1994, started like any other for Fogle.

The 30-year-old was sitting in his car outside the store in the 900 block of South East Military Drive, writing his nightly activity log. The last entry was around 1 a.m.

Police believe that things took a dramatic turn.

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"There was an alarm going off, so we believe that caught his attention," said SAPD Detective Michael DeLeon. "He exited his car to go investigate what was happening at the front of the store. As he was walking away from his vehicle, this is when he was, we believe, confronted by these would-be burglars. Mr. Fogle made a run for the front door and was shot in the back multiple times, killing him instantly."

Police know of only one witness: a security guard who was working at the Taco Cabana across the street. He heard the shots and called police.

Read the rest of the story here.