saumil patel's father was the man behind the cash register. >> he is like everything is fine now that he's arrested. >> reporter: here you can see him run up and tap the armed robber. >> i see the gun and he's like go back otherwise i shoot you and i go in the back and he just run out. >> reporter: police posted images to social media. >> members of our community were brave enough to come forward. >> reporter: thank to community tips officers arrested 27-year-old michael to other photos, the fbi investigating him for over a dozen armed robberies in four states. >> it's even more satisfying when you're able to help wrap up cases for other communities in have been preyed upon for the last month. >> reporter: sletzinger's family has a home in harwich where police say they found these stolen guns, a blue hat found in this surveillance video and another hat seen in other images. the pa tells bought the store a year -- the pa tells bought the store a your -- the patels bought the store a year and a half ago and after this they are staying. the fbi is looking to see whether the man they call