Mary Ann Wells, 31, of San Diego was shot to death on September 25, 1988. Her body was found fully clothed in a downtown alley; nothing was reported stolen. Wells worked as a sex worker on El Cajon Boulevard, an area where several women were targeted during that period.

Investigators later linked her murder to Andrew Urdiales. Urdiales was identified in April 1997 as Wells’s killer and was convicted in connection with her death and the deaths of several other women.

What information might help fill gaps about Wells’s final hours or any witnesses in the El Cajon Boulevard area?