A 17-year-old Big Rapids man was arrested Friday for armed robbery and carrying a concealed weapon.
The robbery happened just before 5 p.m. in the 300 block of South Third Street near Big Rapids.
The suspect stole money from the victim using brass knuckles and a knife.
Law enforcement says the victim and suspect knew each other.
The suspect was arrested by the Big Rapids Department of Public Safety and Mecosta County Sheriff's Deputies.