Police are asking for help in the investigation into a murder that has gone unsolved for more than 20 years.

On August 12, 1996, Dorothy Lubbock was found murdered inside her home on Roosevelt. Three men were seen running from her home.

Police believe the men robbed her and killed her.

Lubbock was the mother a San Antonio police officer and a DPS trooper.

If you know anything about this crime, please call Crime Stoppers at 224-STOP and you could get a reward of up to $5,000.