A man is being sought by police after allegedly robbing a south-side Walmart in San Antonio with a knife. The suspect, described as wearing a Superman shirt, attempted to rob the store in the 1200 block of Southeast Military Drive near Goliad Road and I-37 in March. Employees confronted him, prompting him to flee the scene. Surveillance footage captured the incident, but the suspect remains at-large. Authorities urge anyone with information to contact Crime Stoppers or local law enforcement. The case remains active as investigators continue their search for the individual.