Thomas Mackin, 19, has been arrested in connection with a robbery at a Jack in the Box in the 1600 block of West Military Drive.
San Antonio police robbery detectives said Mackin walked into the restaurant around 11 a.m. Thursday and allegedly pointed an automatic weapon at a clerk, and demanded money from two registers.
Mackin then allegedly forced the clerk into the back office and demanded even more money.
Police said he fled in a car, but was spotted by alert witnesses. SAPD robbery detectives tracked Mackin to a home where he was taken into custody.
"Fortunately we have great citizens in this city and and I have very good detectives in my unit and due to the conversations that they had and the information we were able to glean from it, every person that was able to put it together we were able to get that investigative leads that pointed right at him, and sure enough, we were sitting on him and we found him," said Russ Van Geffen, SAPD Robbery Task Force Supervisor.
Police said they found the exact amount of money stolen during the robbery. Mackin has been charged with aggravated robbery.