It was closing time Aug. 5 at Blue Fins Bait Tackle Guns when surveillance cameras captured four men walking into the Dundalk store.
"The males entered the store, orchestrated, took their time, took cash, weapons and we think a computer," said Baltimore FBI Special Agent Steven Skinner.
A fifth suspect waited outside with the getaway car keeping lookout.
"It was a violent robbery but no one was hurt thankfully," Skinner said.
The Baltimore FBI violent crimes task force and the ATF Baltimore Division are working the case. Three of the men are already behind bars in Baltimore County, and agents were able to recover some of the firearms.
"Right now three of the individuals are arrested, they're incarcerated, we're looking for a fourth, Tavon Hawkins, and we're asking for the public’s help identifying the fifth individual,” Skinner said.
Hawkins, 34, was arrested shortly after the ABC2 story aired Monday night.
Agents are still looking for the fifth suspect, seen wearing an Orioles hat in the surveillance video.
If you know anything call Baltimore FBI at 410-265-8080. You could get a reward of up to $5,000 for information that leads to the arrest and conviction.