Neal Edwin Abernathy, 43, and his 12-year-old son Brendan were found dead from gunshot wounds at their Hercules, California, home on February 19, 1997. Neal, who owned Precision Tune in Pinole, was discovered by his wife Susan after she returned home and noticed cupboards, cabinets and drawers left open. Susan at first thought Neal and Brendan were playfully wrestling, then realized they were not and called 911 from a neighbor’s house.

Investigators compiled roughly 600 pages of reports and repeatedly re-examined the files, re-interviewed witnesses and re-tested evidence, but were unable to determine a motive or identify the killer or killers. Detectives have stated they do not believe the murders were random; the department later doubled the reward for information leading to an arrest and conviction.

Who in the Hercules area in February 1997 might have seen or heard something that could finally break this case?