Police want a suspect, who has been on the run for about a month, to be caught before he attacks again.
Surveillance video captured on Jan.12 at Pronto Insurance off Highway 48 in Brownsville.
It happened about 2 p.m. when the man casually walked in, wearing a hat, red bandana over his face and holding a plastic bag.
He went up to the only employee in the business with a knife in hand and demanded money.
The cashier abided and the suspect quickly made off.
Police believe this suspect is linked to at least three other aggravated robberies at businesses.
It's unclear if he is working alone or if others are involved.
No one has been injured in the hold-ups.
Anyone with information is encouraged to contact Brownsville Crime Stoppers at 546-TIPS.